Internal Hex, Internal Torx, External Torx, TX, Hex
AF, Imperial, Torx, SAE, Metric
3/16 ", 5/16 ", 35 mm, 11/16 ", 10 mm
1/4, 1/2, 3/4, 2-1/2, 3/8
38.1, 25.4, 19.05, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide