Internal Hex, Internal Torx, External Hex, Hex, TX
AF, Torx, Imperial, Metric, SAE
3/16 ", 5/16 ", 5/8 ", 11/16 ", 25 mm
1/4, 2-1/2, 3/8, 1/2, 3/4
25.4, 6.35, 19.05, 12.5, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide