External Hex, Internal Torx, Internal Hex, TX, Hex
Torx, AF, Metric, Imperial, SAE
9/32 ", 5/16 ", 7/8 ", 28 mm, 1-1/2 "
3/4, 3/8, 1-1/2, 2-1/2, 1/2
25.4, 12.5, 9.53, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide