Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Metric, Torx, AF, SAE
7/32 ", 5/16 ", 3/16 ", 12 mm, 11/16 "
12.5, 6.35, 25.4, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide