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,