This suction nozzle reminds me of a product from TV, haha! But, you know what? It works! I'm constantly dusting drywall, plaster, concrete, etc. while drilling holes, and now I can vacuum while drilling! What an invention. This is a really clever idea and uses the vacuum's suction power to just push against the wall and all the dust just falls into the C-shaped area and is collected in a small gap by the vacuum. It's not an expensive item, so if you have a vacuum and like to drill, this is a great tool!