We have this old large front door which a previous home owner threw on a common Home Depot variety Schlage. Looked awful. Purchase this lock set as a replacement. Instructions are well written. Amazing difference! Love it. One side note. I did have to do a slight modification by grinding down the internal lever so the mechanism operated as designed. This was because the previous installation was not perfect. I'm handy with a garage full of tools so it was a simple modification.