Replacement chair tips are easy to install on tubular-style legs & require no adhesive. Use on folding chairs & tables to protect floor surfaces from scratches & rust stains. Chair tips also help keep rooms quiet by reducing noise & reduce chair damage by alleviating stress on joints. Tips are recommended for 7/8" round legs & 3/4" square legs. Recommended floor surfaces include vinyl, tile, linoleum, ceramic, carpet, wood & marble.