Internal Hex, Internal Torx, External Hex, TX, Hex
AF, Torx, Metric, Imperial, SAE
5/8 ", 7/8 ", 3/16 ", 15 mm, 11/16 "
1-1/2, 3/8, 2-1/2, 3/4, 1/2
6.35, 9.53, 12.5, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide