External Hex, Internal Hex, Internal Torx, Hex, TX
Imperial, Torx, Metric, AF, SAE
7/8 ", 9/16 ", 5 mm, 9 mm, 1-1/2 "
19.05, 6.35, 25.4, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide