Internal Hex, Internal Torx, External Hex, Hex, TX
Torx, Metric, AF, Imperial, SAE
9/32 ", 6 mm, 9 mm, 5/16 ", 11/16 "
3/8, 3/4, 2-1/2, 1/2, 1/4
25.4, 9.53, 19.05, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide