Internal Torx, External Hex, Internal Hex, Hex, TX
Metric, AF, Imperial, Torx, SAE
7/16 ", 3/8 ", 7/8 ", 11/16 ", 29 mm
1-1/2, 3/8, 3/4, 2-1/2, 1/2
19.05, 9.53, 25.4, 38.1, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Oxide, Black Phosphate