These heavy-duty drawer slides are built from high-hardness steel for dependable strength and long-term durability. The full-extension, 3-fold design helps you access the entire drawer, while the double-lock mechanism helps keep drawers securely in place. Double-row ball bearings support smooth operation, and the nylon cushioning helps reduce noise during opening and closing. These slides are suited for cabinets, industrial drawers, RVs, trucks, vending machines, and other storage applications.