Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Imperial, Torx, Metric, SAE
9 mm, 5/16 ", 3/4 ", 33 mm, 11/16 "
3/8, 1, 1-1/2, 2-1/2, 3/4
12.5, 6.35, 25.4, 19.05, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide