Product Description The combined crank key from AVTODELO's "Professional" series is used for working with fasteners during car repairs. It is suitable for use in car workshops, service centers, and garages, as well as for personal use. - Made from chrome-vanadium steel using hot forging at a reduced temperature of the blank. - The working profiles of the key are manufactured with increased accuracy and thermally hardened to a hardness of 39-41 HRC. - It has a standard profile for the open part of the key, and an OVER DRIVE profile for the ring part. - The 75-degree angle of the ring jaw relative to the key flat surface ensures easier installation. - Wear-resistant and 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, repair time for the car is significantly reduced. The "Professional" series key is perfectly suited for working with both undamaged fasteners and those with burrs, bites, and other damage.