High load capacity, supporting up to 100 pounds for heavy boxes. With a 45mm width, these slides accommodate various drawer types and carry reasonable loads. Featuring 3-stage full extension ball bearings, they allow for extended drawer travel. This set includes 10 pairs of drawer slides, sufficient for 10 drawers. Constructed from cold-rolled steel, ensuring smooth drawer opening without excessive friction or resistance. Item Type: Drawer Slide Width: Approx. 45 mm / 1.8 inches Load Bearing: 100lb Material: Cold-rolled steel, double-row solid steel balls Surface Treatment: Electrophoretic black Material Thickness: Approx. 1.2 mm / 0.05 inches How to Use: 1. Open the package. 2. To install, separate the inner rail from the main body of the drawer slide using the rear spring buckle. 3. First, attach the outer rail and the middle rail section to the sides of the drawer box, then install the inner rail onto the drawer's side panel. Pre-drilled holes are common in furniture; otherwise, you may need to create them. 4. For best results, assemble the drawer as a whole. Use the two holes on the rail for vertical and frontal adjustment of the drawer. Ensure both left and right slides are level. 5. Mount the inner and outer rails, securing the inner rail to the drawer cabinet's length with screws in the measured position, ensuring it aligns with the already installed middle and outer rails. 6. Tighten the corresponding screw holes. 7. Repeat for the other side, ensuring inner rails are horizontal and parallel. 8. If the middle and outer rails are not level, preventing smooth sliding, check the outer rail's position or adjust the inner rail to match. 9. After installation, test the drawer's operation. Adjust if necessary. Smooth push-pull action indicates successful installation. Package Includes: 20 x Drawer Slides