OTC's No. 5940 BMW Head Bolt Socket makes short work of removing and/or installing cylinder head bolts on BMW M42 4-cylinder and M50 6-cylinder DOHC engines. Designed specifically for removing these bolts, this tool features an E12 external TORX socket on the end of an extension sized to reach these bolts without the need for additional extensions. Equipped with a spring loaded detent ball to hold the bolts in place on the end of the tool, making installation and removal simple and easy. Use with a 1/2 inch ratchet, breaker bar, or torque wrench (not included). Manufactured from durable, high quality materials for excellent performance and long life. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.