External Hex, Internal Hex, Internal Torx, Hex, TX
AF, Torx, Imperial, SAE, Metric
7/16 ", 5.5 mm, 25 mm, 30 mm, 10 mm
1/4, 3/4, 1, 1-1/2, 2-1/2
38.1, 19.05, 9.53, 12.5, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide