External Hex, Internal Torx, Internal Hex, TX, Hex
Imperial, AF, Metric, Torx, SAE
5/16 ", 7/8 ", 11 mm, 7/16 ", 10 mm
1-1/2, 1/4, 2-1/2, 1/2, 1
9.53, 38.1, 6.35, 25.4, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide