Our slot cutters are interchangeable and can be combined and stacked on the same arbor giving you a wide range of cutting possibilities. Use A Router For Biscuit Joining without using a biscuit joining machine. Biscuit joining is one of the strongest, fastest, safest and most accurate ways to join hard and soft woods, plywood, composition board, etc. By using our Biscuit Slot Cutter Assembly Kit , you can join corners (frame joining & miter joining), edge to surface (butt joining & T-joining), and edge to edge. Use Item Biscuit Slot Cutter Assembly Kit cut slots in the center of the board which would be beyond the reach of a slot cutter.