【Solid Steel Industrial Ball Bearings for Better Load-Bearing Capacity】The slide rail is designed with two sets of ball bearings inside, all made of solid steel balls. In addition to maintaining the rail's mobility, it effectively increases its load-bearing capacity. Full-extension drawer slides allow access to the entire space, and drawers can be fully extended for easy storage. 【Rustproof, Long-lasting】The surface of the slide rail uses a black electrophoretic coating process, which isolates direct contact with water and air to prevent oxidation and rusting of the slide rail and improve its corrosion resistance. Over 100,000 opening and closing tests have been performed to verify its durability, and the normal lifespan of the slide rail is over 30 years. 【Full-extension slides】Full-extension slides allow access to the entire space, and drawers can be fully extended for easy storage. The slides are designed with two sets of internal ball bearings, all made of solid steel. In addition