Fits my Rockwell saw perfectly and cuts smoothly. The Rockwell saw I bought only came with 1 blade which was great for cutting 2 by 4s but not the best finish for cutting plywood. This is exactly the blade I needed, 120 tooth saw!  Such a smooth finish. Very nicely made and durable blade. Came packed very well with a hard plastic around the edges to prevent any one from getting cut. Surely worth the price to have this blade in your collection.  Very affordable saw blade. Fits any saw with 3/8 inch arbor and 4 1/2 inch blade. Would buy this again if needed due to normal use. Good product from Porter-Cable. Thumbs up!!