I really begrudge paying someone to change a watch battery for me, especially since I understand how to do it and I know it's easy with the right tools. Well, this is one of those tools that is the right tool, and unfortunately (or fortunately?) it's necessary for a lot of snap casebacks. Different tools for screw in casebacks, but I digress. . .The other day I went to change the battery in my basic everyday Timex, and had no trouble popping off the caseback and installing the new battery. But I could not get the caseback to snap back in. This is probably a good thing because it means the rubber gasket, which was properly seated, has a tight seal when the caseback is on. But I have small hands and arthritis, so I couldn't push hard enough. I ended up having to set up my table vise and carefully do it that way, which was not a good idea though it worked without damaging the watch. I declared, "No more shall I use the inappropriate tools on my beloved watches!" And I bought this.When it arrived, I was surprised to see that it came very nicely packaged but the press itself disassembled, but the press itself took about 3 minutes to assemble. It's well made of aluminum and the screws that fit into the aluminum parts fit well and are cleanly threaded. The included allen wrench makes it a breeze. I guess I could have noticed when I was looking at it to purchase but didn't, and so was surprised to see it came with a basic pry tool for caseback opening, a watchband tool, and some sheets of tissue paper, which I assume are for further protecting the watch face and case from scratches. The mold disks that come with the press can be screwed on so they stay stable while you are snapping the caseback on with gradual, gentle pressure. I have a lot of cheap watches and so it is just a matter of time before I need to change another battery, but I suspect this will be much easier and safer than using the table vise or a hammer or other bad ideas. If I run into any issues, I will update the review. But overall, this seems like a great press for the price!Note that the description says "This set is only suitable for round dials with diameters between 22mm and 42mm, not for watches with other shapes such as square, oval" so be sure your watches that you may want to change the battery on are round and under 42mm case size. 42mm case size is on the average-small size for men's watches. If you have a lot of watches with larger case sizes, you will need a different press set.Also, if you have not used a press like this before, it's helpful to review any documentation on which size molds to use for the watch case/face and caseback so you are applying pressure appropriately.