Multiple brand circular saw blades we’re run through our “NASTY SANDWICH” OF BUILDING MATERIALS comprised of lag fasteners, flashing, shingles and wood. only one circular saw blade makes it all the way through, so if you aren’t using diablo’s Tracking Point 7-1/4 in. x 24-Tooth Framing Circular Saw Blade You’re WASTING MONEY on CIRCULAR SAW BLADES!