Stable, precise, and backlash-free joint with a double low-friction spring for smooth opening and closing. The polishing, combined with a thin oil film (finishing 2), provides the best protection against corrosion. There are no issues with the electrical circuit due to possible peeling of the chrome plating. The cutting edges are additionally hardened with high-frequency, with a hardness of approximately 62 HRC. Made of high-quality special tool steel, forged and hardened in oil.