External Torx, Internal Torx, External Hex, Hex, TX
Imperial, Metric, AF, Torx, SAE
5/16 ", 7/16 ", 3/16 ", 17 mm, 9/16 "
3/4, 1/4, 1/2, 2-1/2, 1-1/2
25.4, 38.1, 9.53, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide