8′′ framesaver exterior door frame rot repair kit (4-9/16")... betterdoor what’s included: (1) lh 8” framesaver bottom (1) rh 8” framesaver bottom where does it go? -these pieces are fastened to the bottom of the door frame, adjacent to the sill system what does it do? -the composite bottom, which is finger-jointed to the wood, protects your door frame from warping and rotting -these bottoms finish and paint like wood, allowing you to match this piece to existing jamb finishes.