If I had to name the best tool I've ever bought from Harbor Freight, it would have to be their SDS Rotary Hammer. I don't use it every day, by any means, but I'm sure I've drilled almost 200 holes in concrete with it. A few years ago I dragged it around in my crawlspace installing plates to anchor the superstructure of the house to the 60+ year old concrete foundation. Each plate was attached to the concrete with 2 anchor bolts, so right there was 64 1/2" holes. I couldn't always handle it with kid gloves in that difficult location but it worked flawlessly. Since then I've drilled dozens more holes with it, and also used it to break up concrete in a couple of small projects. I like it so much that I bought another one as a backup for when this one gives out, but I'm starting to think it never will.