Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Metric, AF, Torx, SAE
15/16 ", 5/16 ", 11/16 ", 9 mm, 32 mm
3/8, 2-1/2, 1-1/2, 1/2, 1/4
9.53, 12.5, 38.1, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide