These treads were horrible quality! Each and everyone of of the 15 in the box had loose or worn threading where you could see the bottom of the tread at the edges. It was very noticeable. Not only was the craftsmanship poor, but the tread moved every rime my 60 pound dog came down the steps. They were rough and not comfortable to step on. I am returning these immediately despite being charged nearly 15 to ship them back. That is three times the amount I paid for the original shipping. I have bought many things from Wayfair before, but this is by far an inconceivable fleecing of a customer to return a terrible product. Not sure how the rest of these reviews are so positive, but rest assured mine is a true opinion of an unhappy customer.