External Hex, Internal Torx, External Torx, Hex, TX
Torx, AF, Imperial, SAE, Metric
13/16 ", 9/16 ", 5.5 mm, 26 mm, 29 mm
3/4, 1/2, 1/4, 2-1/2, 3/8
25.4, 19.05, 12.5, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide