Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, AF, Torx, Metric, SAE
7/8 ", 10 mm, 7/16 ", 3/4 ", 11/16 "
25.4, 9.53, 19.05, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide