These heavy-duty drawer slides are built from high-hardness steel for reliable support in cabinets, industrial drawers, commercial equipment, RVs, and trucks. The 3-fold full-extension design gives you complete access to the drawer contents. A double-lock mechanism helps keep drawers secure during movement, while ball bearings and nylon cushioning promote smooth, quiet operation. The galvanized finish helps resist rust and wear over time. This pair includes mounting screws and is designed for a proper fit with compatible drawer sizes.