Internal Torx, Internal Hex, External Hex, TX, Hex
Metric, AF, Imperial, Torx, SAE
3/4 ", 7/8 ", 9/16 ", 18 mm, 28 mm
19.05, 9.53, 38.1, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide