First, this is not a construction tool, it is well made and easy to maintain. Can't comment on durability yet but I used it on a cemented old post that has always been in my yard. The 7 foot bar in the picture gave me a workout trying to break this thing. I spent about an hour on the prop and made some progress. This post foundation was about 3 feet wide and 3 feet deep, I knocked it out along with the wen in about an hour. You need a decent compressor to keep the air pressure as close to 90psi as possible. It works on lower but not so good ones. I recommend it and think it's worth the money. 4 stars only because I haven't used it long enough to comment on its durability.