External Hex, Internal Torx, Hex, TX, External Torx
Imperial, AF, Torx, SAE, Metric
5.5 mm, 16 mm, 18 mm, 5/8 ", 23 mm
3/4, 2-1/2, 1-1/2, 1/4, 3/8
19.05, 6.35, 38.1, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate