Works very well. I bought them to poke holes in wine bottles. If you buy them for this purpose, you can buy smaller lights or a different set of bits. The largest of them didn't have a hole large enough for the garland to pass through and I had to enlarge it entirely. I used the largest nozzle and it worked, but I was afraid I would break the bottle. They do their job and hold up well. Does not become dull after long-term use.