The super coarse brush scrapes away mud, grass, sawdust, snow and other hard stuck on debris from the soles, tread and edges of your boots or shoes without causing harm. Includes four screws for easy bolt down. Perfect for the home, garage, workshop, office buildings or farm. Measures 9.5 x 6.5 x 4.8 inches. Other brands use wood edges that rot and crack when they get wet or exposed to extreme heat and cold, these heavy duty plastic edges will not.