Internal Hex, External Hex, Internal Torx, Hex, TX
Imperial, AF, Torx, Metric, SAE
5 mm, 5.5 mm, 7/16 ", 9/16 ", 23 mm
3/4, 1-1/2, 2-1/2, 1/2, 3/8
38.1, 19.05, 6.35, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate