We have a 10 inch Shaver. We had an 8 inch for years, but it took forever to get big corner posts driven and all posts in rocky ground. The 10 inch is much better. A lot of guys around here are going to 12 inch now. Ours is three point hitch. Some guys like them on the front of the tractor because they don't jump around as much. However, we use 8 and 9 ft. corner posts, so all we have to do is raise the lift a little higher. If the driver is on the front, you have to pull the tractor up on blocks for long posts. If you are just going to drive a few small posts, an 8 inch Shaver would do and used ones usually go for less than $500. Used 10 inch Shavers usually run around $1200. If you are looking at new ones, I'd go ahead and get a 10 inch. About the only thing that goes bad on these drivers are the springs, but a new set of springs will drive several hundred posts if you store the driver inside. As far as brands, Shaver and Worksaver are very similar and work good. I'm not familiar with Kinghitter or Jet. I've heard the Danuser pto doesn't hit very hard. Finally, if you've never used a post driver, be careful. Keep your hands in the right places and watch for flying splinters (sometimes posts bust apart).
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