External Hex, Internal Hex, External Torx, TX, Hex
AF, Torx, Metric, Imperial, SAE
9/32 ", 5.5 mm, 5/16 ", 7 mm, 5/8 "
3/4, 3/8, 1-1/2, 1, 2-1/2
25.4, 9.53, 19.05, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide