Internal Hex, External Torx, Internal Torx, TX, Hex
AF, Metric, Torx, Imperial, SAE
11/16 ", 5/8 ", 9/16 ", 9 mm, 1-1/2 "
1/2, 1-1/2, 3/4, 2-1/2, 3/8
6.35, 38.1, 19.05, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide