For removing stripped, rusted, broken, or smooth studs. The stud extractor is designed for use with a 3/8-inch square drive impact wrench. It will work effectively with smooth, broken, rusted, stripped, and smooth studs, within 9.5 mm. Made with a chrome vanadium body with chrome molybdenum jaws and quickly removes broken and damaged threaded studs. The hex drive can be a driver with a wrench, ratchet, or impact tool. Product Description Specification Color: Silver + Black Scope of application: within 9.5 mm Material: metal Include: 1x Stud Extractor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.