Internal Hex, Internal Torx, External Hex, TX, Hex
Metric, Torx, AF, Imperial, SAE
7 mm, 5/8 ", 9/16 ", 1-1/2 ", 9 mm
1-1/2, 3/4, 1, 2-1/2, 1/2
6.35, 19.05, 25.4, 9.53, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide