Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Metric, AF, Torx, SAE
9/16 ", 1/4 ", 7/16 ", 7 mm, 5/16 "
1, 1/4, 2-1/2, 1-1/2, 3/8
12.5, 9.53, 25.4, 6.35, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide