Internal Hex, External Hex, Hex, TX, 6-Point
Torx, Imperial, AF, Metric, SAE
9/16 ", 9 mm, 12 mm, 11/16 ", 25 mm
3/4, 1, 2-1/2, 1-1/2, 3/8
12.5, 9.53, 6.35, 25.4, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide