The RWM 31 Series is perfect for a wide range of light duty industrial, institutional, material handling, and general purpose applications including the moving of furniture, electronics, medical equipment and stands, food service and institutional equipment and carts (hotels, resorts, hospitals, restaurants, schools and many other applications). The heavy duty zinc plate finish is both attractive and corrosion resistant. Swivel models provide greater maneuverability, while rigid models offer straight line mobility. Brake options are available on swivel models only. Mounting Plate size is 2-1/4" x 4-7/16".