As a result of using this kit, I found that it made installing hole saws incredibly easy saving me time and hassle... The mandrels were sturdy and held the saws securely in place, allowing for precision cuts. The included Allen wrench was a nice touch for tightening the MANDRELS. The only con was that there were no additional saws included in the kit, but that`s a minor issue that can be easily remedied. Overall, this is a great addition to any DIYer's tool collection..