We have done two repipes, two remodels,and several repairs with this tool and it is terrific. Fast and effortless - way, way better than a hand expander (in a crawl space? really??). 1/2" and 3/4" are effortless. We've only done a couple 1" connections; didn't have any problems there either. One regular battery gets us through most of a 3/4" and 1/2" project - it comes with two,so you switch when it slows down. It does weird things if you don't grease it correctly (comes with the grease), and the bits are very hard - we broke the tip off of one dropping it on concrete (our fault :-o) For plumbing repair and remodel it is the cats meow.