Internal Torx, External Hex, TX, Hex, External Torx
Imperial, Metric, Torx, AF, SAE
5 mm, 9/32 ", 15 mm, 3/16 ", 1-1/2 "
1/4, 1-1/2, 3/4, 1, 2-1/2
38.1, 25.4, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide