Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Torx, Metric, Imperial, SAE
5/16 ", 7/16 ", 11 mm, 34 mm, 25 mm
1/4, 1-1/2, 2-1/2, 1/2, 3/8
19.05, 38.1, 6.35, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide