External Torx, Internal Hex, External Hex, TX, Hex
Torx, AF, Imperial, Metric, SAE
5.5 mm, 15 mm, 5/16 ", 23 mm, 1-1/2 "
1-1/2, 3/8, 2-1/2, 1/2, 3/4
25.4, 9.53, 6.35, 19.05, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide