Internal Hex, Internal Torx, External Hex, TX, Hex
Metric, Imperial, Torx, AF, SAE
5 mm, 7/16 ", 1 ", 5/16 ", 11 mm
1, 1/2, 2-1/2, 1-1/2, 3/8
12.5, 19.05, 6.35, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide