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