A threaded pin in the sliding arm engages with the rail's ribbing. This effectively prevents the clamp from loosening or slipping. Both the upper and lower parts are made of high-quality ductile iron and reinforced with ribs. The powder coating protects against corrosion, and the characteristic rib profile provides reliable reinforcement against torsional forces. The BESSEY hollow profile rail, produced in-house, is specifically optimized for clamps. The six-fold ribbing further prevents the clamp from slipping. The tool-free interchangeable pressure plate adds even more convenience to your workday, allowing for easy and quick replacement.