Internal Hex, Internal Torx, External Hex, TX, Hex
AF, Imperial, Metric, Torx, SAE
11/32 ", 9/32 ", 13/16 ", 10 mm, 26 mm
1/2, 1/4, 3/4, 2-1/2, 3/8
25.4, 6.35, 9.53, 38.1, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide