Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Torx, Imperial, Metric, SAE
13 mm, 17 mm, 5/16 ", 11/16 ", 10 mm
1, 1-1/2, 3/8, 2-1/2, 1/2
38.1, 25.4, 9.53, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide