Feature: 1. GALVANIZED IRON: These drawer slides are made of excellent iron, with a galvanized surface, high hardness, corrosion resistance, and oxidation resistance. 2. BALL BEARING: These drawer slides are driven by ball bearings to ensure smoother drawer closure, and double row steel balls make the rails more stable. 3. STABLE OPERATION: The slide rail ensures stable sliding and high load capacity, making it suitable for use with drawers in bathroom, foyer, living room, or bedroom. 4. DETACHABLE BUCKLE: These metal slides come with detachable buckles that can be easily removed with just one press, made of nylon, lightweight and durable. 5. EASY ADJUSTMENT: The 3 point screw hole design ensures that the drawer slide is more secure and can be adjusted according to the installation size. Specification: Item Type: Drawer Slides Material: Iron Color: Black Length: Approx. 55cm / 21in Width: Approx. 4.5cm / 1.8inHow to Use: 1. When installing the drawer slide, it is necessary to remove the inner rail from the main body of the drawer slide. The removal method is also very simple. There is a spring clip on the back of the drawer slide, which can be easily removed with just a gentle press. 2. Install the outer and middle rails of the split slide on both sides of the drawer box first, and then install the inner rails on the side plate of the drawer. If it is finished furniture, it is necessary to punch holes in the drawer box and drawer side panels for installation. 3. When installing the slide, it is recommended to first assemble the drawer as a whole. There are two types of holes on the track for adjusting the distance between the drawer and the front and back, while ensuring that the left and right slide rails are in the same horizontal position and cannot differ too much. 4. Then install the inner and outer rails and fix them to the length of the drawer cabinet using screws at the measured position. 5. Tighten the corresponding hole positions of the two screws separately. 6. The other side also follows the same method, but pay attention to keeping the inner rails on both sides horizontal and parallel. 7. If the left and right sides of the middle and outer rails in the previous step are not kept horizontal, there will be a situation where the casing cannot be pushed in. It is necessary to check the position of the outer rail or adjust the inner rail to match the position of the outer rail. 8. After installation, pull the drawer and try again. If there are any problems, you need to adjust it again. If the drawer is smooth, you can finish work.. Package List: 10 x Inner Fixed Slides10 x Outer Fixed Slides80 x Screws