This drawer slide is specifically designed to meet the needs of high-intensity use. Made of 0.77 in. (19.5 mm) thick high-hardness steel, it has a weight capacity of up to 500 lbs. allowing it to easily bear various heavy objects. The galvanized surface treatment enhances the rust and wear resistance of the drawer slide, ensuring stable long-term use. With its unique double-lock design, you can lock the slide with just a gentle press, ensuring that the items in the drawer are safe and stable even in a bumpy environment. The drawer slide adopts a 3-fold full-extension design, with a length of 21 in. (540 mm), a width of 3 in. (76 mm), and a thickness of 0.77 in. (19.5 mm). It can fully extend the drawer, fully releasing the drawer space and making it easy to access items. The double-row ball bearing design makes the opening and closing of the drawer smooth, and the nylon cushioning device on the central slide effectively reduces the noise during use and avoids the rebound phenomenon. Whether it is used for shelving, cabinets, industrial drawers, RVs, trucks, vending machines, or other scenarios, it can provide users with a reliable drawer sliding solution with its excellent performance, taking into account both practicality and durability.