Internal Hex, External Hex, TX, Hex, External Torx
Imperial, Torx, AF, Metric, SAE
15/16 ", 5/16 ", 5/8 ", 1-1/2 ", 11/16 "
1-1/2, 1, 2-1/2, 3/8, 3/4
9.53, 38.1, 25.4, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide