This is a set of fixing holders for the Caraz baby playpen. These optional parts are designed to prevent the playpen panels from moving or bending, significantly enhancing safety. You can rest assured even if your child leans against the playpen. The set includes 2 straight holders and 2 corner holders, for a total of 4. Installation is tool-free; simply insert them into the bottom of the panels. Recommended for those who want to further stabilize their Caraz baby playpen or are considering purchasing additional panels. Please feel free to comment if you have any questions. Thank you.