Internal Torx, External Hex, Internal Hex, Hex, TX
Metric, AF, Torx, Imperial, SAE
3/16 ", 7/16 ", 11/16 ", 9 mm, 26 mm
1/4, 1-1/2, 3/4, 1/2, 2-1/2
25.4, 38.1, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide