I implemented the 12” culvert cover and couldn’t be happier. The old sharp edges of the culvert are now completely covered. My grandkids can now play in that area without any concern of sharp edges. Ordering process was easy, cover was delivered in promised time frame. After digging out dirt around culvert, the cover easily slipped on to the cover. Filled it with sand to add weight and stability. And screwed it all together from inside, it’s not going anywhere. Would highly recommend.