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. Features & Benefits: • For use with an impact wrench. • Fits studs from 6-12mm(1/4"-1/2"). • Carbon Steel casing with Chrome Molybdenum jaws. • Works effectively on broken, rusted, stripped and smooth studs. • Model No. AK718 Specifications: Model No AK718 Brand: Sealey Capacity: 6-12mm(1/4"-1/2") Drive: 1/2"Sq Nett Weight: 0.20kg