Description Descriptions: Type:Screw Extractor Set or Single Item:Set Drive:Electrical Material:Steel Application:Grinding and Cutting, Mixing, Grinding/Sanding, Cutting Product Features [PRO-QUALITY]: Premium chrome molybdenum steel industrial grade extractors are ideal for removing broken screws, bolts, nuts, studs, fittings, threaded pipes and pins and is perfect for any mechanics tool kit. [PRECISION]: Precisely machined aggressive multiplane teeth with left hand spiral design provides extra gripping power and faster threading. [CONVENIENT]: High-visibility size markings on each extractor for quick selection of the right drill bit for extraction applications. [DESIGN]: Specially designed hexagon head for applying maximum torque with sockets and wrenches Package included: 1/8(M3.5), 5/32(M4), 3/16(M5), 7/32(M5.5), 1/4(M6.5), 9/32(M7.5), 5/16(M8), 11/32(M9), 3/8(M10), 13/32(M11), 7/16(M11.5), 15/32(M12), 1/2(M13), 17/32(M14), 9/16(M14.5), 19/32(M15.5), 5/8(M16), 21/32(M17), 11/16(M18), 23/32(M18.5), 3/4(M19.5), 25/32(M20), 13/16(M21), 27/32(M22), 7/8(M23) Instructions: Step 1: Select a drill bit that is smaller diameter than the screw or fastener to drill a whole aligned straight with the screw. Step 2: Insert the screw extractor clockwise into the bored whole of your stuck fastener until snug. Step 3: With a ratchet or wrench turn counterclockwise to remove the stuck fastener.