Internal Torx, Internal Hex, External Hex, Hex, TX
Torx, AF, Metric, Imperial, SAE
7/8 ", 9 mm, 15 mm, 1/4 ", 3/4 "
1/2, 1-1/2, 1, 3/4, 2-1/2
25.4, 19.05, 9.53, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide