External Torx, Internal Torx, External Hex, Hex, TX
AF, Metric, Torx, Imperial, SAE
3/16 ", 5.5 mm, 9/16 ", 36 mm, 25 mm
1, 3/4, 1-1/2, 2-1/2, 3/8
25.4, 19.05, 6.35, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide