This product features a rounded corner design to reduce the risk of accidental bumps and The raised edges on the surface prevent items from slipping off, ensuring secure placement.Make the most of your bed space by simply attaching the shelf to the bed frame and placing it under the mattress. The thickness of your mattress leads to various loading capacities. we recommend using this bedside table for a mattress thickness above 5.9inch(15cm), but if your bed frame is not level with your mattress, it won’t work.