XZN Bit, also known as Triple Square, is a type of screw drive with 12 equally spaced tips, each with a 90 degree angle. Its name derives from overlaying 3 equal squares to form such a pattern with 12 right-angled tips. Common sizes are M6, M8, M10, and M12 . Triple square drives are used in high torque applications, such as cylinder head bolts and drive train components. Triple square fasteners are commonly found on German vehicles such as Audi, BMW, Mercedes, and Volkswagen.


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