The Milwaukee Rip Fence Kit for Circular Saws provides a straight cutting edge for fast, accurate cuts. Cut with confidence when you attach the fence directly to model 6405-6 (8-1/4"), models 6390-20, 6390-21 or 6394-21 (7-1/4") or model 6460 (10-1/4") circular saws. The edge guide is hinged so you can flip it up and out of the way when you're not using it. The kit includes one thumb screw.