The 1/4" Drive Stud Extractor, No. 29894, from Mayhew Tools is designed to fit into small areas to remove hard-to-reach seized, stripped, or broken studs and bolts. This extractor is made from high-grade, heat-treated alloy steel, and has a chrome finish for additional rust protection. The extractor clamps down on the damaged stud and maintains a firm grasp of the screw/bolt as it is removed. It can be adjusted to fit studs from 2mm to 7mm in diameter and can be driven with a 1/4" square drive, or a 1/2" wrench, allowing the user to pick the correct driver for the job.