This 3-1/2" diameter bit has a back cutter which allows milling of both the front and back of the panel at the same time. This gives you exactly the thickness you need to insert into your stile. Also, with the back cutter, all 5 pieces of your raised panel door can be cut out of the same thickness of stock and both the front and back of the door will be flush on both sides. An additional small bearing (688ZZ) promotes safety by allowing you to take 2 separate passes.
Item # 01015B