External Hex, Internal Hex, Internal Torx, Hex, TX
Torx, AF, Imperial, Metric, SAE
1 ", 9/16 ", 3/16 ", 5.5 mm, 36 mm
1-1/2, 2-1/2, 1/2, 3/8, 1
6.35, 25.4, 9.53, 19.05, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide