Internal Torx, Internal Hex, External Hex, TX, Hex
Metric, AF, Imperial, Torx, SAE
9 mm, 16 mm, 15 mm, 5/16 ", 23 mm
1-1/2, 3/4, 2-1/2, 1/4, 1/2
25.4, 38.1, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide