I bought this to drill a small hole in a small piece of quartz crystal that I bought to make a necklace for my wife for my husband in 2012 could win. The small nozzle is perfect for this. I filled the bathroom sink and drilled just below the surface of the water to avoid overheating the tip and inhaling the seemingly deadly silica dust. I'm still alive, my wife loves me again, and the trophy on my robe proves it.