Internal Torx, Internal Hex, External Hex, Hex, TX
Metric, Torx, AF, Imperial, SAE
3/16 ", 7 mm, 13 mm, 11/16 ", 35 mm
1/4, 3/4, 2-1/2, 1-1/2, 1/2
9.53, 6.35, 19.05, 25.4, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate