Heavy-Duty Full Extension Drawer Slides: Smooth & Durable Superior Weight Bearing: Designed with two sets of solid steel ball bearings, these slide rails not only ensure smooth movement but also significantly increase the load capacity of the rail. Full Extension Access: Enjoy complete access to your drawer space. Drawers can be fully pulled out for easy storage and retrieval of items. Rust-Proof & Long-Lasting: The rail surface is treated with rust-proof stainless steel, isolating it from direct contact with water and air to prevent oxidation and rust, enhancing corrosion resistance. Tested for over 100,000 open-and-close cycles, these rails boast a normal lifespan of over 30 years. Premium Construction: Crafted from high-quality cold-rolled steel, these heavy-duty drawer slides offer high strength and density, capable of supporting heavy storage without deformation. Enhanced Durability: The bottom is equipped with a limited rubber bumper and ABS plastic, providing excellent wear resistance and impact resistance for prolonged use.