Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, Metric, AF, Torx, SAE
5/16 ", 7/16 ", 7/32 ", 5.5 mm, 25 mm
3/4, 2-1/2, 1-1/2, 1/2, 3/8
9.53, 25.4, 6.35, 12.5, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide