Internal Hex, External Hex, Internal Torx, TX, Hex
Metric, Torx, AF, Imperial, SAE
7/16 ", 5/8 ", 3/4 ", 25 mm, 11/16 "
1-1/2, 1, 2-1/2, 1/2, 3/4
19.05, 25.4, 6.35, 38.1, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide