Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, AF, Torx, Metric, SAE
5/8 ", 5/16 ", 7/16 ", 9/16 ", 36 mm
1-1/2, 3/8, 3/4, 2-1/2, 1/2
9.53, 38.1, 25.4, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide