Internal Hex, Internal Torx, External Hex, TX, Hex
AF, Torx, Imperial, Metric, SAE
9 mm, 11 mm, 23 mm, 35 mm, 11/16 "
1, 1-1/2, 2-1/2, 1/2, 3/8
25.4, 6.35, 12.5, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide