Collins Tool 1/2 Ply Prep Router Bit

The Ply Prep router bit solves that annoying old problem of core expansion in plywood and other sheet goods. It cuts a slight depression on the edge of the plywood leaving the surface veneers proud. The adjoining molding will not be pushed away from the skins when there is a little space for inner plies to swell being wet with glue. This makes it easy to get perfect closure every time. You can actually clamp with masking tape and never have to putty a seam again.