Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Torx, Metric, Imperial, SAE
13 mm, 5.5 mm, 5/8 ", 29 mm, 1-1/2 "
25.4, 9.53, 6.35, 12.5, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide