External Hex, TX, Hex, External Torx, 6-Point
AF, Imperial, Torx, SAE, Metric
9/32 ", 15 mm, 5.5 mm, 11 mm, 11/16 "
1-1/2, 3/4, 1/2, 2-1/2, 1/4
9.53, 38.1, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate