We recently had our French patio doors replaced with a large doggie door in the secondary door and our little old terrier wasn’t able to get out, so we purchased these ramps for him, to make his life easier and allowed him to be able to go outside and get back inside without having so much difficulty. The ramps are heavy enough that they don’t move even with our big dogs and they are the perfect height and width for what we needed. I would definitely buy them again if we should ever need another set.