Product Description The combined key AUTO PARTS from the "Professional" series is used for working with fasteners during the repair of a car. It is suitable for use in auto repair shops, service centers, and garages, as well as at home. - Made of chrome-vanadium steel using the hot stamping method at a reduced temperature of the blank. - The working profiles of the key are made with increased precision and heat-treated to a hardness of 39-41 HRC. - It has a standard profile of the open part of the key, and the ring part has an OVER DRIVE profile. - The angle of inclination of the ring jaw at 15 degrees relative to the key plane provides more convenient installation. - Wear-resistant, suitable for long-term use under maximum loads. - Protected against corrosion with a matte chrome-nickel coating. Thanks to the OVER DRIVE profile on the ring part of the key, the repair time of the car is significantly reduced. The "Professional" series key is perfectly suited for working with undamaged fasteners as well as with fasteners that have burrs, bites, and other damages.