Internal Hex, External Torx, External Hex, Hex, TX
AF, Torx, Imperial, Metric, SAE
9 mm, 11/16 ", 9/16 ", 3/16 ", 14 mm
3/8, 1-1/2, 3/4, 1/4, 2-1/2
25.4, 38.1, 6.35, 19.05, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate