External Hex, External Torx, Internal Hex, Hex, TX
Torx, Imperial, AF, Metric, SAE
15/16 ", 9/16 ", 9 mm, 5/8 ", 23 mm
1/4, 2-1/2, 1-1/2, 3/8, 3/4
38.1, 25.4, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide