Internal Hex, Internal Torx, External Hex, TX, Hex
Torx, Imperial, AF, Metric, SAE
12 mm, 7/16 ", 13/16 ", 3/16 ", 3/8 "
1/4, 3/4, 2-1/2, 3/8, 1/2
6.35, 19.05, 12.5, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide