The first thing that struck me about this particular model is its weight. To a guy like me, heavy means well built, and this thing is a heavy nut. It's great because it has enough power to demolish anything and with a twist of the handle you can drill a 6" hole in 3ft of granite. This is the best and most amazing power tool I have ever owned and I have a lot of them. I've been a plumber for many years and swear by Milwaukee tools. The batteries are great, the tools are always well built, and their wood drill bits are the best in the business. Thanks to Milwaukee and thanks to Revain for the good deal.