Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, AF, Torx, Metric, SAE
9 mm, 9/16 ", 3/16 ", 10 mm, 5/8 "
3/8, 1/2, 1/4, 2-1/2, 3/4
19.05, 12.5, 6.35, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide