Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Metric, Imperial, Torx, SAE
7/8 ", 5/16 ", 7/16 ", 11/16 ", 25 mm
1/4, 1-1/2, 3/4, 1, 2-1/2
25.4, 12.5, 19.05, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide