The DW-PRO is a 12.5" diameter measuring wheel which was designed and built with the professional user in mind. DW-PRO's are ideally suited for rolling over longer distances and rough surfaces. The DW-PRO boasts the premium features of a Counter-Clear control mounted on the pistol grip as well as a trigger operated brake. They also have a wide stance folding kickstand. They are available in Ft/10ths, and Meters/Centimeters models.