Using the KLIMB without the legs installed is a great way to introduce and get your dog comfortable with the KLIMB. The KLIMB Safety Plug inserts into the four corner holes so that small dog legs don’t slip into or get caught in the holes. We recommend also recommend using the KLIMB Non-Skid Feet in this configuration if you plan on using the KLIMB on a hard surface such as tile or concrete. For use when the standard legs are not installed.