Festool Domino DF 500 Joining System Unique, patented cutting action that rotates and oscillates to create perfect, clean, and repeatable mortises every time. Mortise width adjustment with the turn of a dial allows for easier alignment when joining panels. Pivoting Fence allows you to create angled mortises from 0-90 with positive stops at 22.5, 45, 67.5. Indexing pins for quick alignment against the edge of the workpiece for accurate placement. Dust extractable design provides clean mortise holes for better glue adhesion and longer cutter life.