We have just moved into our new house and while hanging curtains we found that we had to drill through the underside of some joists to get the height we wanted. It's clear my old drills weren't in debt and a few of them broke trying to do this. These didn't break. Loved the compact case it comes in, it's also easy to store in the drill case which is very handy. The price was pretty good value too. I'm currently looking at her stonework and a few other sets to add to my husband's collection.