Two HGR20-500 mm linear rails with four HGW20CC flange-style blocks are included. The blocks are used together with the rails, and the internal linear bearing provides smooth sliding. The rail is made from high quality carbon steel and produced with quenching and tempering technology. It offers long wear resistance, high stability, high bending strength, and minimal deformation or twisting, ensuring reliable linear movement. Four-point contact design enables uniform load handling in all directions (top, bottom, left, right) and includes a self-aligning function to compensate mounting surface errors with high precision under heavy loads. Steel support rail with pre-drilled holes allows easy mounting. The linear guide bearings on the axis are stainless steel for reliable linear motion. Easy to install and maintenance-free. Applications and scenarios: - Use in CNC machines or milling/engraving setups for precise X-axis travel. - Automated assembly lines or pick-and-place systems requiring stable, multi-direction load handling. - Precise motion in 3D printers, inspection equipment, or lab automation setups where smooth, maintenance-free guidance is needed.