Internal Hex, External Hex, TX, Hex, External Torx
AF, Metric, Torx, Imperial, SAE
7/32 ", 5.5 mm, 7/16 ", 11/16 ", 15/16 "
1/2, 1-1/2, 3/8, 2-1/2, 3/4
12.5, 9.53, 6.35, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide