Cuts medium aggregate, medium abrasive sand. Soff Cut FLX line of Ultra Early Entry diamond blades have the same features of Excel Series blades but offer a more economical priced option. The FLX blades also feature the triangular shaped safety arbor that fits precisely on the patented Soff Cut saw arbor. Fits the Soff-Cut models 4000 & 4200 and includes the Skid Plate