Product information
Material: S2 steel, chrome vanadium steel sizes 4mm, 5mm, 6mm, 8mm, 9mm, 10mm, 12mm, 14mm, 16mm, 18mm insert drive sizes -1/4 inch (about 6.35mm) 4mm, 5mm, 6mm -3/8 inch (about 9.5mm) 8mm, 9mm, 10mm, 12mm, 14mm (approx. Stag stop ) - 1/2" (approx. 12.7 mm) 16 mm (with stagger), 18 mm (with stagger).