Alpha® Contour blade together with the AWS-125 Stone Cutter allows fabricators to cut a sink hole along the cut line quickly and safely. In order to shape the edge to a desired profile, Alpha® introduces the Profiler Z-Series, Vertical Grinding Wheels. Profiler Z-Series is also known as Zero Tolerance or Drum Grinding. Most competitive products use sintered bond which eventually changes the shape of the wheel distorting the vertical edge. Using our Profiler Z-Series maintains a very aggressive cutting performance and its original shape for a long time.We recommend this Vertical Grinding Wheel along with a Corner Ruler to make uniform exterior corners.