Internal Hex, Internal Torx, Hex, TX, External Torx
AF, Torx, Imperial, SAE, Metric
11 mm, 18 mm, 7/16 ", 26 mm, 11/16 "
3/4, 1, 3/8, 1-1/2, 2-1/2
38.1, 19.05, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide