External Hex, Internal Torx, TX, Hex, External Torx
Imperial, Metric, Torx, AF, SAE
7/16 ", 9/16 ", 3/16 ", 5/8 ", 26 mm
1, 1-1/2, 2-1/2, 3/8, 1/2
38.1, 25.4, 6.35, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate