The hardness of the material of the working part of the key is 42 HRc (GOST requirements 41-46 HRc). The key has a reliable chrome anti-corrosion coating. The ring head profile has 12 surfaces, which increases the contact surface of the working surfaces and reduces the risk of deformation of the surface of the fasteners during installation. The inclination angle of the ring-shaped head is 15 degrees in relation to the plane of the key, making installation more convenient. The open and ring throat combination wrench is designed for the installation of threaded connectors.

- Use: installation of threaded connections
- Property: combined star-fork, ring head tilt angle 15 degrees
- Size: 19mm
- Material: carbon steel
- Coating: anti-corrosion chrome