Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Torx, Imperial, SAE, Metric
3/16 ", 5.5 mm, 11/16 ", 33 mm, 28 mm
1-1/2, 2-1/2, 1/2, 3/4, 1
6.35, 9.53, 25.4, 19.05, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide