Internal Hex, External Hex, Hex, TX, External Torx
AF, Metric, Torx, Imperial, SAE
9/32 ", 3/16 ", 5/16 ", 7/16 ", 5 mm
1/4, 3/8, 1/2, 2-1/2, 3/4
19.05, 38.1, 9.53, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide