Check the listing for details. 1Pair Heavy Duty Drawer Slides 20 Inch 500 lb Load Capacity Side Mount Extension. Color: Silver, Condition: New, Made in United States. Listed at 39.18 USD. Feature:[Lock Drawer Slides]: Press the blue handles on both sides at the same time to lock and unlock the drawers, they can be locked when fully closed and fully opened to prevent sliding. Locking slides can be used in shelves, cabinets, industrial drawers, RVs, trucks, vending machines, etc.[Max Load Capacity 500lb, 30-year Service Life]: Heavy duty drawer slides are made of 2.5mm thick Q235 thick steel plate, high-strength, high-density high-quality cold-rolled steel. It can support heavy load storage without deformation, and the bottom is equipped with a limited rubber pad, which is made of ABS plastic, with good wear resistance and impact resistance. After testing, the number of opening and closing times has reached more than 800,000 times.[Full Extensi.