Internal Hex, Internal Torx, External Hex, Hex, TX
AF, Metric, Torx, Imperial, SAE
9/32 ", 15/16 ", 7/8 ", 9/16 ", 11/16 "
1-1/2, 3/4, 2-1/2, 3/8, 1/2
6.35, 19.05, 9.53, 25.4, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate