Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Metric, Torx, Imperial, SAE
9/32 ", 1/4 ", 7/16 ", 11/16 ", 5/16 "
1, 1-1/2, 1/2, 2-1/2, 3/4
9.53, 25.4, 6.35, 19.05, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate