【Industrial Solid Steel Balls for Enhanced Weight Support】The slide rail is engineered with two sets of ball bearings, all constructed from solid steel balls. This design not only maintains the rail's smooth movement but also significantly boosts its load-bearing capacity. Full extension drawer slides provide access to the entire space, allowing drawers to be pulled out completely for effortless storage. 【Rust-Proof, Long-Lasting Durability】The surface of the drawer slide has undergone stainless steel treatment to prevent direct contact with water and air, thereby inhibiting oxidation and rust. This enhances its corrosion resistance. Rigorously tested with over 100,000 opening and closing cycles, its durability is verified, with a normal lifespan exceeding 30 years. 【Full Extension Rails】Full extension rails grant access to the entire storage space, enabling drawers to be pulled out completely for easy organization. The rails feature two sets of ball bearings, all made from solid steel balls. Beyond maintaining the rails' smoothness, these ball bearings effectively increase their load capacity. 【Product Features】Constructed from high-quality cold-rolled steel, these heavy-duty drawer slides offer high strength and density, ensuring they won't deform under intense storage demands. The bottom is equipped with a limited rubber bumper and ABS plastic for superior wear resistance and impact absorption.