Internal Torx, Internal Hex, External Hex, Hex, TX
Metric, AF, Imperial, Torx, SAE
5 mm, 3/16 ", 5/16 ", 5/8 ", 9/16 "
1-1/2, 1/4, 2-1/2, 1/2, 3/8
6.35, 9.53, 38.1, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide