Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, AF, Metric, Torx, SAE
1 ", 11/16 ", 5/16 ", 7/8 ", 9/16 "
3/4, 1-1/2, 2-1/2, 1/2, 1
6.35, 19.05, 12.5, 38.1, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide