Package includes: 2 shelves + 4 screws + 4 plastic screw anchors +4 screw caps Max weight capacity: 40lbs Mount type: wall mounted Material:aluminum Installation method: 1. Clean the installing wall surface. 2. Mark the midpoint of the holes on the wall with pencil. 3. Drill holes in the spots where you've marked, be sure that you hold the drill perpendicular to the wall so that the anchor will sit parallel to the ground. 4. Tap the plastic screw anchors into the wall. 5. Put the washers through the screws in right direction. 6. Turn screws tight and fix the shelf. 7. Screw the caps on tightly. 8. Finish