Internal Torx, Internal Hex, External Hex, TX, Hex
Metric, Torx, AF, Imperial, SAE
11/16 ", 7/16 ", 9/16 ", 5/16 ", 9 mm
1-1/2, 2-1/2, 1/2, 3/8, 3/4
19.05, 25.4, 6.35, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide