Internal Hex, Internal Torx, External Torx, Hex, TX
Imperial, AF, Torx, SAE, Metric
9/16 ", 7/8 ", 5/8 ", 11/16 ", 25 mm
3/4, 1-1/2, 1, 2-1/2, 3/8
6.35, 38.1, 19.05, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate