External Hex, External Torx, Internal Torx, TX, Hex
Metric, Torx, AF, Imperial, SAE
9/16 ", 11/16 ", 11 mm, 34 mm, 35 mm
1-1/2, 3/8, 1/2, 1/4, 2-1/2
12.5, 9.53, 6.35, 25.4, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide