Product Description The combined crank key AVTODELO of the "Professional" series is used for fastening work during car repairs. It is suitable for use in car workshops, auto repair shops, and service stations, as well as at home. Made of chrome-vanadium steel using the hot stamping method with reduced billet temperature. The working profiles of the key are manufactured with increased precision and heat-treated 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 end relative to the key plane provides more convenient installation. It is wear-resistant and suitable for long-term use under maximum loads. Protected from corrosion by a matte chrome-nickel coating. Thanks to the OVER DRIVE profile on the ring part of the key, the 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, remnants, and other damages.