Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, Metric, Torx, AF, SAE
7/8 ", 9/16 ", 3/16 ", 1-1/2 ", 11/16 "
1/4, 3/4, 1-1/2, 1/2, 2-1/2
25.4, 6.35, 19.05, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide