Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Imperial, Torx, Metric, SAE
1/4 ", 7/16 ", 25 mm, 32 mm, 11/16 "
1, 1-1/2, 2-1/2, 3/8, 1/2
9.53, 19.05, 38.1, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide