These heavy-duty drawer slides are built from high-hardness steel for durable, stable performance in cabinets, industrial drawers, commercial equipment, and modified vehicles. The 3-fold full-extension design gives full access to the drawer while the double-lock mechanism helps keep it securely in place. Ball bearings and nylon cushioning support smooth, quiet operation during opening and closing. The galvanized finish helps resist rust and wear over time. This pair includes detailed guides and mounting screws for installation.