External Hex, Internal Hex, Hex, TX, External Torx
Imperial, AF, Torx, Metric, SAE
18 mm, 5/16 ", 34 mm, 32 mm, 1-1/2 "
1/2, 1-1/2, 3/4, 1, 2-1/2
19.05, 38.1, 25.4, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide