Steel: 6140CrV 44-48 HRC Nickel plating A: 20 mm; B: 15 mm; C1: 5 mm; C2: 6 mm; Length: 130 mm. The classic version of a combination wrench with an open-end profile on one side and a twelve-sided ring profile on the other. The combination wrench is the most common type of wrench as it combines the capabilities of the open-end and ring profiles. The ring profile is offset from the longitudinal axis of the wrench body by 15°, allowing for work in restricted spaces. The precision manufacturing of the twelve-sided ring profile minimizes the likelihood of slipping off the edges of fasteners. The angle of inclination of the open-end part relative to the longitudinal axis of the wrench body is 15°, allowing for a minimum angular step of up to 30° when working in hard-to-reach areas.