Tape Free: No tape, adhesive, glue. The backing has non-slip adhesive. Brakki bullnose carpet stair treads can be firmly stuck to the stair floor, and its back has a non-slip function to prevent the stair mats from moving when walking. Our stair treads protect your stairs from everyday scratches and wear. Don't worry about it damaging your hardwood floor, there will be no residue after installation. Edging Stair Protectors: Our non slip stair treads is superior to most products on the market, and its advantage is that it can protect the edges of the stairs, which is a function that many products don t have.