{"product_id":"400n-29-pc-nitro-jobber-drill-set","title":"400N 29 PC NITRO Jobber Drill Set","description":"\u003ch2\u003eDRILLCO 400N 29-Piece NITRO Jobber Drill Set — Heavy-Duty HSS Drilling from 1\/16\" to 1\/2\"\u003c\/h2\u003e\n\u003cp\u003eThe DRILLCO 400N 29-Piece NITRO Jobber Drill Set is a premium-grade high speed steel drill set engineered for heavy-duty drilling in medium and high strength materials. Built to NAS Type B Jobber Length specifications, this set covers 1\/16\" through 1\/2\" by 64ths, providing contractors and trades professionals with a complete fractional size range for the most common drilling tasks. The 135° split point geometry and Black \u0026amp; Gold surface treatment deliver superior performance over standard HSS drills in both handheld and CNC applications. Speed, feed, and lubrication are all critical to cutting tool performance with this set.\u003c\/p\u003e\n\n\u003cimg src=\"https:\/\/images.salsify.com\/image\/upload\/s--nY10sg1f--\/qdflscpwgybzwskann5e.jpg\" style=\"max-width:100%;margin:16px 0;\"\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eDRILLCO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eItem #\u003c\/td\u003e\n\u003ctd\u003e400N29\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e045997491646\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiece Count\u003c\/td\u003e\n\u003ctd\u003e29 PC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize Range\u003c\/td\u003e\n\u003ctd\u003e1\/16\" – 1\/2\" by 64ths\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrill Type\u003c\/td\u003e\n\u003ctd\u003eNAS Type B Jobber Length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePoint Angle\u003c\/td\u003e\n\u003ctd\u003e135° Split Point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePremium Grade HSS (M2 High Speed Steel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003eBlack and Gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eDrilling holes in medium and high strength materials; heavy-duty drilling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Operations\u003c\/td\u003e\n\u003ctd\u003eHandheld portable drills; fixed spindle \/ CNC machines; drill presses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Length\u003c\/td\u003e\n\u003ctd\u003e0.886 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Width\u003c\/td\u003e\n\u003ctd\u003e1.673 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Height\u003c\/td\u003e\n\u003ctd\u003e2.854 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e5.72 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTechnical Tips\u003c\/td\u003e\n\u003ctd\u003eSpeed, feed, and lube are all critical to cutting tool performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eAvailable Individual Sizes (400N Series — Fractional Jobber Length)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003e400N EDP No.\u003c\/th\u003e\n\u003cth\u003eBlister Pack EDP No.\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\/16\"\u003c\/td\u003e\n\u003ctd\u003e400N104\u003c\/td\u003e\n\u003ctd\u003e400N104BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N105\u003c\/td\u003e\n\u003ctd\u003e400N105BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003ctd\u003e400N106\u003c\/td\u003e\n\u003ctd\u003e400N106BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N107\u003c\/td\u003e\n\u003ctd\u003e400N107BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\/8\"\u003c\/td\u003e\n\u003ctd\u003e400N108\u003c\/td\u003e\n\u003ctd\u003e400N108BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N109\u003c\/td\u003e\n\u003ctd\u003e400N109BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/32\"\u003c\/td\u003e\n\u003ctd\u003e400N110\u003c\/td\u003e\n\u003ctd\u003e400N110BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N111\u003c\/td\u003e\n\u003ctd\u003e400N111BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\/16\"\u003c\/td\u003e\n\u003ctd\u003e400N112\u003c\/td\u003e\n\u003ctd\u003e400N112BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N113\u003c\/td\u003e\n\u003ctd\u003e400N113BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7\/32\"\u003c\/td\u003e\n\u003ctd\u003e400N114\u003c\/td\u003e\n\u003ctd\u003e400N114BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e15\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N115\u003c\/td\u003e\n\u003ctd\u003e400N115BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\/4\"\u003c\/td\u003e\n\u003ctd\u003e400N116\u003c\/td\u003e\n\u003ctd\u003e400N116BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e17\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N117\u003c\/td\u003e\n\u003ctd\u003e400N117BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9\/32\"\u003c\/td\u003e\n\u003ctd\u003e400N118\u003c\/td\u003e\n\u003ctd\u003e400N118BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e19\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N119\u003c\/td\u003e\n\u003ctd\u003e400N119BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/16\"\u003c\/td\u003e\n\u003ctd\u003e400N120\u003c\/td\u003e\n\u003ctd\u003e400N120BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e21\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N121\u003c\/td\u003e\n\u003ctd\u003e400N121BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11\/32\"\u003c\/td\u003e\n\u003ctd\u003e400N122\u003c\/td\u003e\n\u003ctd\u003e400N122BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e23\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N123\u003c\/td\u003e\n\u003ctd\u003e400N123BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\/8\"\u003c\/td\u003e\n\u003ctd\u003e400N124\u003c\/td\u003e\n\u003ctd\u003e400N124BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N125\u003c\/td\u003e\n\u003ctd\u003e400N125BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13\/32\"\u003c\/td\u003e\n\u003ctd\u003e400N126\u003c\/td\u003e\n\u003ctd\u003e400N126BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e27\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N127\u003c\/td\u003e\n\u003ctd\u003e400N127BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7\/16\"\u003c\/td\u003e\n\u003ctd\u003e400N128\u003c\/td\u003e\n\u003ctd\u003e400N128BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e29\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N129\u003c\/td\u003e\n\u003ctd\u003e400N129BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e15\/32\"\u003c\/td\u003e\n\u003ctd\u003e400N130\u003c\/td\u003e\n\u003ctd\u003e400N130BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e31\/64\"\u003c\/td\u003e\n\u003ctd\u003e400N131\u003c\/td\u003e\n\u003ctd\u003e400N131BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\/2\"\u003c\/td\u003e\n\u003ctd\u003e400N132\u003c\/td\u003e\n\u003ctd\u003e400N132BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThe NITRO 400N series outperforms standard HSS drills through the combination of M2 premium high speed steel, a self-centering 135° split point, and a Black \u0026amp; Gold surface treatment that provides maximum lubricity — advantages that standard bright-finish or black oxide drills do not offer. The NAS Type B jobber length design makes these drills the most versatile length for the widest range of job-site and shop applications, suitable for both handheld and CNC operations without requiring a tool change.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\n\u003ch4\u003ePremium M2 High Speed Steel Construction\u003c\/h4\u003e\n\u003cp\u003eAll NITRO drills are manufactured from premium quality M2 High Speed Steel, the material of choice for heavy-duty drilling across a wide range of material groups including stainless steel. M2 HSS provides the hardness and toughness needed to maintain a cutting edge longer than standard HSS, reducing the frequency of bit replacement on demanding job sites.\u003c\/p\u003e\n\n\u003ch4\u003e135° Self-Centering Split Point\u003c\/h4\u003e\n\u003cp\u003eThe 135° split point is self-centering, which reduces thrust requirements and minimizes walking when starting a hole — eliminating the need for a center punch in most applications. This four-facet geometry allows for faster penetration and is particularly effective on curved surfaces and when hand-drilling harder materials.\u003c\/p\u003e\n\n\u003ch4\u003eBlack \u0026amp; Gold Surface Treatment for Maximum Lubricity\u003c\/h4\u003e\n\u003cp\u003eThe body and flute of every NITRO drill receive a Black \u0026amp; Gold surface treatment that provides better resistance to corrosion and breakage while increasing lubricity and reducing chipping and flaking. Greater lubricity means less heat buildup at the cutting edge, which directly extends tool life during sustained drilling operations.\u003c\/p\u003e\n\n\u003ch4\u003eJobber Length Versatility\u003c\/h4\u003e\n\u003cp\u003eJobber length is the most common drill length because it provides extra reach and can be used in the majority of applications. This set's NAS Type B jobber length profile makes it suitable for use in portable hand drills, drill presses, and fixed-spindle CNC machines without requiring a length-specific setup.\u003c\/p\u003e\n\n\u003ch4\u003eComplete 29-Piece Fractional Size Range\u003c\/h4\u003e\n\u003cp\u003eThe set contains 29 drills covering 1\/16\" through 1\/2\" by 64ths, giving contractors a complete fractional progression in a single kit. Having every size on hand eliminates job-site delays caused by missing intermediate sizes.\u003c\/p\u003e\n\n\u003ch4\u003eHeavy-Duty Design for Increased Tool Life and Performance\u003c\/h4\u003e\n\u003cp\u003eThe NITRO series is specifically engineered for heavy-duty drilling, with a design that increases both tool life and performance compared to standard HSS drills. This makes the 400N29 set a cost-effective choice for contractors who drill frequently into medium and high strength materials.\u003c\/p\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\n\u003ch4\u003eHeavy-Duty Drilling in Medium and High Strength Steels\u003c\/h4\u003e\n\u003cp\u003eThe M2 HSS construction and 135° split point make the NITRO 400N the recommended choice for drilling into medium and high strength steel where standard HSS drills wear prematurely.\u003c\/p\u003e\n\n\u003ch4\u003eStainless Steel Drilling\u003c\/h4\u003e\n\u003cp\u003eThe NITRO series is specifically recommended for heavy-duty drilling in stainless steel, a material group that demands higher tool hardness and lubricity than standard HSS can reliably provide.\u003c\/p\u003e\n\n\u003ch4\u003eCNC Machine Operations\u003c\/h4\u003e\n\u003cp\u003eThe NAS Type B specification and self-centering split point make these drills ideal for fixed-spindle CNC applications where consistent hole location and reduced thrust are critical to part quality.\u003c\/p\u003e\n\n\u003ch4\u003eHandheld Portable Drill Operations\u003c\/h4\u003e\n\u003cp\u003eThe jobber length and self-centering split point reduce walking on startup, making these drills well-suited for handheld drilling where a drill press or fixture is not available.\u003c\/p\u003e\n\n\u003ch4\u003eDrill Press Work\u003c\/h4\u003e\n\u003cp\u003eThe complete 1\/16\"–1\/2\" size range by 64ths covers virtually all fractional hole sizes encountered in fabrication and construction work at the drill press.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Materials\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMedium strength steels\u003c\/li\u003e\n\u003cli\u003eHigh strength steels\u003c\/li\u003e\n\u003cli\u003eStainless steel\u003c\/li\u003e\n\u003cli\u003eMost materials compatible with Black \u0026amp; Gold surface treatment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Documents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0551\/8396\/6382\/files\/bbz48awmftjmmy4umjo7_1131160c-7ba6-462d-acf7-d6cba5545a57.pdf?v=1793216876\" target=\"_blank\" rel=\"noopener\"\u003eSafety Data Sheet (SDS)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0551\/8396\/6382\/files\/mmdfl5l1u5ie5htyl6lr_703977e8-9485-4991-904f-c3dbe0e33df4.pdf?v=1793216876\" target=\"_blank\" rel=\"noopener\"\u003eProduct Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0551\/8396\/6382\/files\/cinakvujelpexceens0b_b4ae3793-13cb-49c3-891f-dbaa07c8151c.pdf?v=1793216876\" target=\"_blank\" rel=\"noopener\"\u003eLinecard\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety Data Summary\u003c\/h3\u003e\n\u003ch4\u003eHazard Information\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDuring normal operation and usage, high speed steel products do not present inhalation, ingestion, or other chemical hazards.\u003c\/li\u003e\n\u003cli\u003eGrinding, cutting, machining, burning, and welding may release dusts, fumes, or vapors that present health hazards if exposure limits are exceeded.\u003c\/li\u003e\n\u003cli\u003eExcessive inhalation of metallic fumes and dusts may cause irritation of eyes, nose, and throat; symptoms may include metallic taste, dryness and irritation of the throat, chills, and fever persisting 12–48 hours.\u003c\/li\u003e\n\u003cli\u003eChromium is listed as a carcinogen by NTP and OSHA; various forms of dermatitis and inflammation of the upper respiratory tract are associated with chromium exposure.\u003c\/li\u003e\n\u003cli\u003eTungsten: some evidence of pulmonary involvement such as cough.\u003c\/li\u003e\n\u003cli\u003eVanadium: eye and respiratory tract irritant.\u003c\/li\u003e\n\u003cli\u003eCobalt dust inhalation may cause productive cough, wheezing, shortness of breath, chest tightness, and weight loss; interstitial fibrosis can lead to permanent disability.\u003c\/li\u003e\n\u003cli\u003eSkin contact with dust can cause irritation or allergic skin rash due to cobalt sensitization.\u003c\/li\u003e\n\u003cli\u003eNFPA Hazard Rating: Health 1; Flammability 0; Reactivity 0.\u003c\/li\u003e\n\u003cli\u003eFine metal particles produced when ground or sawed can burn; high concentrations in air may present an explosion hazard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePersonal Protective Equipment\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCloth or leather gloves when contact with dust or mist is likely.\u003c\/li\u003e\n\u003cli\u003eSafety glasses or goggles with side shields; do not wear contact lenses when handling these materials.\u003c\/li\u003e\n\u003cli\u003eHearing protection may be required.\u003c\/li\u003e\n\u003cli\u003eAlways use machine guards and wear safety glasses and protective clothing to prevent injury in the event of tool breakage.\u003c\/li\u003e\n\u003cli\u003eUse an appropriate NIOSH-approved respirator if airborne dust concentration exceeds the applicable PEL or TLV.\u003c\/li\u003e\n\u003cli\u003eUse local exhaust ventilation adequate to limit personal exposure to airborne dust below PEL or TLV levels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSafe Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePerform grinding, cutting, machining, burning, and welding operations in well-ventilated areas.\u003c\/li\u003e\n\u003cli\u003eStore in a dry place; store in a manner that prevents accidental environmental contamination from traces of industrial lubricants or wetting oils.\u003c\/li\u003e\n\u003cli\u003eClean up using methods that avoid dust generation: vacuum with appropriate filters, wet dust mop, or wet clean-up.\u003c\/li\u003e\n\u003cli\u003eWash hands thoroughly after handling and before eating or smoking; wash exposed skin at end of work shift.\u003c\/li\u003e\n\u003cli\u003eDo not shake clothing, rags, or other items to remove dust; remove dust by washing or vacuuming with appropriate filters.\u003c\/li\u003e\n\u003cli\u003eSoiled clothing should be laundered separately.\u003c\/li\u003e\n\u003cli\u003eIncompatible materials: strong acids, strong oxidizers.\u003c\/li\u003e\n\u003cli\u003eEmergency phone: CHEM-TEL INC 1-800-255-3924.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What drill length type is the 400N series?\u003c\/strong\u003e\u003cbr\u003eA: The 400N series is NAS Type B Jobber Length — the most common drill length, providing extra reach suitable for the majority of drilling applications in both handheld and fixed-spindle setups.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are these drills suitable for CNC machine use?\u003c\/strong\u003e\u003cbr\u003eA: Yes. The NITRO 400N drills are designed for use in both portable handheld drills and fixed-spindle applications including CNC machines and drill presses.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the advantage of the 135° split point over a standard 118° conventional point?\u003c\/strong\u003e\u003cbr\u003eA: The 135° split point is self-centering, which reduces thrust requirements and minimizes walking when starting a hole. This is especially beneficial on curved surfaces and when hand-drilling harder materials where a conventional point would tend to wander.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What does the Black \u0026amp; Gold surface treatment do?\u003c\/strong\u003e\u003cbr\u003eA: The Black \u0026amp; Gold surface treatment provides maximum lubricity across the body and flute of the drill, while also offering better resistance to corrosion and breakage and reducing chipping and flaking compared to uncoated or black oxide finishes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can these drills be used on stainless steel?\u003c\/strong\u003e\u003cbr\u003eA: Yes. The NITRO series is specifically recommended for heavy-duty drilling in stainless steel, in addition to a wide range of other medium and high strength material groups.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What sizes are included in the 400N29 set?\u003c\/strong\u003e\u003cbr\u003eA: The set contains 29 drills covering 1\/16\" through 1\/2\" by 64ths, providing a complete fractional progression for the most common hole sizes encountered in construction and fabrication work.\u003c\/p\u003e","brand":"Drillco","offers":[{"title":"Default Title","offer_id":67885618921646,"sku":"400N29","price":166.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0551\/8396\/6382\/files\/qdflscpwgybzwskann5e.jpg?v=1793216880","url":"https:\/\/www.diamondtoolstore.com\/products\/400n-29-pc-nitro-jobber-drill-set","provider":"Diamond Tool Store","version":"1.0","type":"link"}