Internal Torx, External Hex, Hex, TX, 6-Point
Metric, AF, Torx, Imperial, SAE
7/16 ", 5.5 mm, 7/8 ", 9/16 ", 5/16 "
1/4, 1-1/2, 3/4, 1/2, 2-1/2
38.1, 6.35, 25.4, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide