Internal Torx, External Torx, External Hex, Hex, TX
Imperial, Torx, Metric, AF, SAE
5/16 ", 8 mm, 7 mm, 5/8 ", 11/16 "
1-1/2, 1/4, 2-1/2, 1/2, 1
9.53, 25.4, 12.5, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide