Easy to use and worked well initially. I don't know if I got a defect or not. I only had to use it a few times. Almost useless as the end of the drill is already ground and rounded. It looks like super cheap metal. I'm no newbie when it comes to power tools or drill bits so I made sure they were properly installed in the chuck and all. A few runs and the end of the drill started to shave and is now quite rounded.