Raised Panel Bits With Backcutter To Produce Panels From 3/4" Stock That Are Flush With The Door Frame For A Professional Look. Finished Doors Can Be Sanded With A Wide Belt Sander Or Drum Sander For Easiest Finishing. Shims Are Included To Allow Adjustments Of The Tongue Thickness From 7/32" To 1/4". Cuts All Composition Materials, Plywood, Hardwood, And Soft Wood. Use On Table Mounted Portable Routers.