Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Torx, AF, SAE, Metric
3/16 ", 8 mm, 16 mm, 5/8 ", 11/16 "
9.53, 25.4, 38.1, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide