Internal Torx, External Hex, Hex, TX, External Torx
Imperial, Metric, Torx, AF, SAE
5/8 ", 9/16 ", 28 mm, 1-1/2 ", 11/16 "
1/4, 3/4, 1, 2-1/2, 1-1/2
12.5, 25.4, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide