External Torx, Internal Torx, Internal Hex, TX, Hex
AF, Imperial, Torx, SAE, Metric
5/16 ", 7/16 ", 8 mm, 9/32 ", 23 mm
3/8, 1, 1-1/2, 3/4, 2-1/2
25.4, 9.53, 19.05, 38.1, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide