Internal Torx, External Hex, Internal Hex, Hex, TX
Metric, Imperial, Torx, AF, SAE
5/16 ", 3/16 ", 3/4 ", 25 mm, 34 mm
3/4, 1-1/2, 2-1/2, 1/2, 1
9.53, 25.4, 12.5, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide