Internal Torx, External Hex, TX, Hex, External Torx
AF, Torx, Imperial, SAE, Metric
9/32 ", 15 mm, 5/16 ", 5/8 ", 9/16 "
1/2, 3/4, 2-1/2, 1/4, 3/8
12.5, 6.35, 25.4, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide