External Hex, Internal Torx, Internal Hex, TX, Hex
Imperial, AF, Torx, SAE, Metric
12 mm, 7 mm, 11/16 ", 28 mm, 30 mm
1/4, 1/2, 1, 1-1/2, 2-1/2
38.1, 19.05, 25.4, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide