Internal Hex, Internal Torx, TX, Hex, 6-Point
Torx, AF, Imperial, Metric, SAE
15/16 ", 5/16 ", 11/16 ", 33 mm, 28 mm
1/2, 1/4, 1-1/2, 2-1/2, 3/4
19.05, 12.5, 9.53, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide