Internal Torx, External Hex, Hex, TX, External Torx
Imperial, Metric, AF, Torx, SAE
5/8 ", 26 mm, 23 mm, 1-1/2 ", 11/16 "
1, 1-1/2, 3/4, 2-1/2, 1/2
9.53, 12.5, 25.4, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide