Amana Tool 55433 Carbide Tipped InStile & Rail Concave 5/32 R x 1-5/8 D x 5/8 to 1-1/8 CH x 1/2 Inch SHK w/ Lower BB Adjustable Router Bit Set for Plywood

Bits in these sets have profile and groove or rabbet cutters and ball-bearing guide mounted on a 1/2" shank. Respacing of the components should only be necessary - using the provided shims - after the cutters have been resharpened. Guide straight cuts with the fence; use the pilot bearing only for cuts on curved rails or stiles.