I went with a danuser t3 driver. It cost me nearly double, but has more features and has better reviews. New Danuser Sm40 Post Driver First Look - Youtube (outside diameter) pipe at a rate of up to six strikes per second. Danuser post driver reviews . The danuser hammer takes on the heat. Saturday i tried out my, new to me, danuser post driver. The t3 post driver is a small driver that delivers big time results! Model sm40 has a 40” drop hammer design. The tpd 450 series of post drivers will impress you, big time. Great piece for pulling, digging and cutting ! Www.danuser.com t3 driver warning read this entire manual. The t3 driver’s functionality and updates include: There are several videos on youtube on them now. We bought one of these about a year ago when they were pretty new on the market. I don’t think that i will be using my post auger very much any more. It’s pretty pathetic, and potentially libelous, that shaver fails to include proper documenta...