This tool collects all the dust generated when cutting granite after the first cut has been made and the base of the tool has touched the countertop. I put tape on the round hole on the side to collect more dust. It was not easy to attach the device to an angle grinder. Every time I tightened the worm screw, the plastic housing caught on the angle grinder base plate. I ended up sawing the plastic case to fit the distributor's metal base. That helped. The worm wheel clamp is not as wide as L-clamps. When you tighten the clamp, it unscrews from the edge that clamps the angle grinder. As a result, the elbow does not sit flush with the angle grinder. I ended up temporarily using a screwdriver to fill the gap to keep it from spinning and that kept everything in place.