Internal Hex, Internal Torx, Hex, TX, External Torx
Imperial, Torx, AF, Metric, SAE
7/32 ", 9/32 ", 15/16 ", 5/16 ", 11/16 "
38.1, 19.05, 9.53, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide