Internal Hex, Internal Torx, External Hex, Hex, TX
Torx, AF, Imperial, Metric, SAE
7/8 ", 5/16 ", 5/8 ", 9 mm, 23 mm
3/4, 1, 3/8, 2-1/2, 1-1/2
25.4, 6.35, 19.05, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide