Check the listing for details. 1/2" Drive M6 XZN Bit Socket, Triple Square Spline Bit Socket, CR-MO, Profess.... Condition: New. Listed at 14.56 USD. Bit Compatibilities: M6 XZN. Size: 1/2" M6 Deep. Drive Bit Shank Style: Square. High-contrast laser etched engraving to easily identify which size socket. XZN/Triple Square fasteners are mostly common on Cylinder head bolts, Retaining Bolts, Drive train components and other applications.