Forrest Manufacturing’s Square-Top Woodworker II saw blades create a 90 degree square bottom groove with no scratches or score marks. Instead of grinding a square top, they cut a square bottom, with the 1/8″-kerf blade cutting a 1/8″ groove. It has a 10″ diameter, 40 teeth and a 5/8″ bore. The 1/8″-kerf blade is item number WW10401125, selling for $124.20. An optional 3/32″-kerf blade (WW10401100) to cut a 1/10″ groove is also available.