Internal Hex, External Hex, Hex, TX, External Torx
Torx, Metric, Imperial, AF, SAE
7/32 ", 9/16 ", 5/8 ", 7/8 ", 17 mm
1/2, 1, 2-1/2, 1-1/2, 3/8
12.5, 6.35, 19.05, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide