Designed to remove broken studs, bolts etc. Phosphate finish for corrosion resistance Chrome molybdenum for strength Left hand spiral design for extra gripping power Hexagon shaped so can be used with a spanner 3/8” Drive – Drill sizes: 2, 3, 4, 5 & 6mm 1/2” Drive – Drill sizes: 8, 10, 12, & 14mm Supplied on a metal socket rail for easy storage