Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Metric, AF, Torx, SAE
7/32 ", 8 mm, 15/16 ", 9/16 ", 5/8 "
1-1/2, 1, 2-1/2, 3/4, 1/2
9.53, 12.5, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide