Well built, cartridge well machined and working well, grip is about the right size and should last a while unless for some weird reason you decide to hit it with a 10lb sledgehammer . good enough for hand drilling in softer materials, and the handle holds a lot longer to add them yourself, if they're shorter than about four inches or 10 cm it's actually easier by comparison. The chuck holds a regular 1/4" hex bit just fine, I wouldn't try to put anything larger in it. If you need a hex bit screwdriver I would suggest a screwdriver shaped holder you can get for a few bucks, which is a lot easier in the long run. I took two feet of orange string and looped it around and tied the ends so the contraption could be easily slipped around the main instrument's neck. It's a lot harder to tie a silly little key that way lose, of course your mileage could be very different than I. Please check the included pictures for your entertainment.