500lbs Heavy-Duty: Made of 0.77 in/19.5 mm thick high hardness steel, the heavy duty drawer slides have a weight capacity of up to 500 lbs. The galvanized finish makes the telescoping drawer slides rust and wear-resistant for long-time use. It can be used in shelving, cabinets, industrial drawers, RVs, trucks, vending machines and more. Single Lock Design: Our full extension dresser drawer slides feature a single locking mechanism that securely holds the slides in place, even on bumpy roads. Say goodbye to items slipping off during transportation. Smooth & Quiet Slides: Our drawer slides are designed with a double-row ball bearing system for effortless and noiseless opening and closing. The nylon cushioning on the center slides minimizes noise and prevents bouncing. 3-Fold Drawer Slides: Each package includes a pair of 60 inches/1530 mm long, 2.09 inches/53 mm wide, and 0.77 inches/19.5 mm thick drawer slides with a 3-fold full extension design. Maximize your drawer space with ease. Choose the Right Size: Full extension drawer slides are compatible with most major drawer and cabinets. Please see the pictures for a detailed description of each size when choosing. Please measure the length of your drawers and cabinets (excluding frame boards) before choosing our drawer slides. Note: The length of the slide should not be less than or equal to the depth of the drawer.