Performance Tool bolt extractor sets easily remove damaged or seized fasteners. These kits are offered in a variety of drive widths, as well as SAE and metric size sockets. Deep wall sockets are also available for exposed studs and hard-to-reach or recessed hardware. Each piece is made from heat-treated steel for strength and durability, and the patented gripping edges help to extract old, stripped, rusted, or painted nuts and bolts.