Internal Hex, Internal Torx, Hex, TX, External Torx
Imperial, AF, Torx, SAE, Metric
9/16 ", 3/16 ", 12 mm, 23 mm, 29 mm
1/4, 1, 1-1/2, 2-1/2, 1/2
38.1, 19.05, 6.35, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide