Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Metric, AF, Torx, SAE
7/32 ", 9/32 ", 3/16 ", 5/8 ", 25 mm
1/2, 3/4, 1-1/2, 2-1/2, 3/8
6.35, 25.4, 19.05, 9.53, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide