Premier Linear Guiding System: a precise combination of main-axis guide rail and aluminum alloy to stabilize the rail assembly. Standard industrial-grade carriage houses a high-precision linear bearing inside. Quality materials: rails are carbon steel; bearings use high-quality bearing steel with aluminum alloy components. Chrome plating provides rust resistance, durability, and hardness. Smooth and precise operation: 4-point contact design supports loads from all directions, delivering strength and high accuracy. The carriage slides smoothly for easy use. Easy installation: align the rail with mounting holes and slide the carriage until fully seated. No maintenance required. Applications: - CNC machines, mills, and routers for accurate linear motion along X/Y/Z axes - Automation systems for repeatable positioning of fixtures and sensors - 3D printers or laser cutters requiring reliable axis guidance