When the crosshairs on your old tub drain are corroded and/or missing and the average drain removal tool fails, use the Tub Drain Extractor to remove those 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 ; Simply drop the tool in the drain and turn it counterclockwise with a 1/2'' ratchet drive and extension or wrench ; The more torque that is applied to the tool the more it will “bite'' into the drain and it will not slip-It’s that simple