I would think it depends on what you are riveting, where and even how many rivets you will be using. If only a rivet every now and then, I'd go for a single hand-held versions some showed above. But if you are riveting a total boat back together, then maybe a pneumatic versions is the better choice. So you have to make that decision up... I personally use a hand held Craftsman what will do 1/8" and 3/16" diameter rivets. It's never left me down. But I usually do a few here and there over the years so no need for me to buy a pneumatic gun..