Internal Hex, External Hex, Hex, TX, External Torx
Metric, AF, Torx, Imperial, SAE
7/32 ", 9/32 ", 5 mm, 1/2 ", 11/16 "
1-1/2, 2-1/2, 1/2, 3/8, 1
9.53, 38.1, 19.05, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide