I make crafts on Pinterest that involve drilling holes in china, glassware, and ceramics. I used my dremel with a diamond cutting attachment and a drill bit with the appropriate attachments and it took me 45 minutes or more to make the holes. That really got me off my projects. I bought them and BAM! The intuitive design means you can just pop it into your drill and get to work. Very fast, for sure. I can't rate the durability as I only used it yesterday. I'll update along the way.