I used this when my large dog was still small. I used three of them at the same time so I could have a spare to use right away, and I used them for about two months, starting around June. There are scratches overall. The locking part is quite chewed up, so only one of them is difficult to lock. You can snap it in by pulling with both hands and pushing. IRIS OHYAMA Pet Tray with Spill-Resistant Edges FMT-635 Shipping Method: Mercari Delivery Packaging: Will be shipped in a plastic bag with cushioning material. Please check the profile before purchasing, and you are considered to have agreed to the terms. This is a personal item kept at home and is not perfect. I have a dog. I am careful, but dog hair may get mixed in. Please purchase only if you understand. Only Mercari delivery is available. Toilet Training Training House Training Indoor Wide Tray