When the crosshairs on your old tub drain are corroded or are missing and the average drain removal tool fails, use Superior Tool’s® Tub Drain Extractor to remove these stubborn 1-1/2" tub drains. Never again will you need to chisel and hammer out the old drain and risk cracking the tub. This time saving tool does all the work with its helical knurl design. The teeth lock in with a light hammer tap. Designed to work with a 1/2" ratchet drive and extension or wrench.