Internal Hex, External Hex, Hex, TX, External Torx
Imperial, AF, Metric, Torx, SAE
8 mm, 9 mm, 11 mm, 7/16 ", 11/16 "
1, 2-1/2, 1/2, 1-1/2, 3/8
19.05, 25.4, 6.35, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide