Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, AF, Torx, Metric, SAE
7/16 ", 15/16 ", 5/8 ", 5.5 mm, 11/16 "
1/4, 3/4, 1-1/2, 2-1/2, 3/8
12.5, 9.53, 25.4, 6.35, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide