You pay for that. I needed it to cut a 4" hole in a pair of cheap $8 tables from IKEA. Since most of the material is bolsa wood or chipboard, I figured this might be enough to get the job done without spending $30-$40 on just a single 4-inch hole saw. I already have a set of smaller Ryobi hole saws and have used this drill head with the 4 inch saw that comes with the set. Mine hasn't warped, warped, bent or broken while I was using it to cut holes in the end of the table. It wasn't hard to cut, but it's not that sharp. Overall I'd say I'm happy with it because it did what I wanted without too much hassle, hence 3 stars. I'm pretty sure it won't cut through hardwood, but if you need to cut holes in less dense or thinner wood, this should work.
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