Internal Hex, External Hex, External Torx, Hex, TX
Torx, Imperial, Metric, AF, SAE
9/16 ", 5.5 mm, 7/8 ", 16 mm, 15 mm
1, 1-1/2, 3/4, 2-1/2, 1/2
19.05, 9.53, 38.1, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide