Internal Hex, External Hex, Internal Torx, Hex, TX
Imperial, Torx, AF, Metric, SAE
9/32 ", 15/16 ", 7/8 ", 26 mm, 33 mm
25.4, 19.05, 6.35, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide