Sealey Impact Stud Bolt Extractor Remover Socket Tool 1/2" Drive 6-12mm Removes broken and damaged threaded studs fast. Fits studs from 6-12mm(1/4"-1/2"). Suitable for use with 1/2"Sq drive air impact wrench. Works effectively on broken, rusted, stripped and smooth studs. Carbon Steel casing with Chrome Molybdenum jaws.Specification: Model No AK718 Brand: Sealey Capacity: 6-12mm(1/4"-1/2") Drive: 1/2"Sq Nett Weight: 0.20kg Product Guarantee: 1 YearCatalogue Page: Page 1229 Sealey Impact Stud Extractor 6-12mm 1/2" Drive Removes broken and damaged threaded studs fast Suitable for use with 1/2"Sq drive air impact wrench Works effectively on broken, rusted, stripped and smooth studs Carbon Steel casing with Chrome Molybdenum jaws Capacity: 6-12mm (1/4"-1/2") Drive: 1/2" Square Drive