Designed for removing broken, stripped, and rusted studs and bolts. Fits sizes from 1/4" to 1/2" and M6 to M12. Toothed chuck design grips shanks securely, increasing power as the drive shaft rotates. Compatible with 3/8" wrenches, hand ratchets, or low-power impact tools. Made from durable impact grade alloy steel with chrome plating for corrosion resistance. Ideal for exhaust manifold studs, broken exhaust system bolts, and more.