Each Wall/Floor Clasp comes with 2 wood screws. Use this clasp to mount your whelping/playpen to a wall stud or subfloor. I personally screw this clasp through a tarp on a carpeted floor directly into the subfloor, allowing me to put the pen into an unused bedroom without taking up the flooring. Clasp installs with a screwdriver and is made of heavy duty industrial PVC. Dishwasher safe.