The Penn Plax Trimmer Ladder is a great addition to your feathered friend''s cage! Not only does it provide space to play and explore for better mobility inside the cage, it naturally trims your pets nails and beak. No more worrying about extra sharp edges! Each of the rungs are coated with lightweight cement made from crushed sea shells, which adds beneficial calcium to your birds every day activities. Its okay for your pet to gnaw at the steps; theyre getting calcium, similar to pecking at a cuttlebone.