Internal Hex, External Hex, TX, Hex, External Torx
Metric, AF, Torx, Imperial, SAE
5/8 ", 11/16 ", 23 mm, 1-1/2 ", 9 mm
1-1/2, 3/4, 1, 2-1/2, 3/8
19.05, 25.4, 9.53, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate