These heavy-duty drawer slides are built from high-hardness steel for dependable strength, smooth operation, and long-term durability. The 3-fold full-extension design gives complete access to the drawer, while the dual-lock mechanism helps keep contents securely in place. Double-row ball bearings and nylon cushioning support quieter, more controlled opening and closing. They are suitable for cabinets, industrial drawers, RVs, trucks, vending machines, and other storage applications.