Internal Torx, External Hex, TX, Hex, External Torx
Imperial, Torx, Metric, AF, SAE
5/16 ", 9/32 ", 5/8 ", 11/16 ", 25 mm
1/4, 1, 1-1/2, 2-1/2, 3/4
12.5, 19.05, 6.35, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide