Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Torx, AF, SAE, Metric
3/16 ", 5/8 ", 9/16 ", 11/16 ", 30 mm
1-1/2, 3/4, 2-1/2, 3/8, 1/2
9.53, 6.35, 19.05, 38.1, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide