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Go to Google and the shopping tab and put in "brazier rivet setter". You can order them for just a few bucks and use a hammer with them if you want. I went to sears and bought an air hammer fairly reasonably. I think most boat rivets Ive seen are 3/16 but I also got a 1/4 inch for wallowed out 3/16 rivets that couldnt be repaired and drilled them out to 1/4. You can also order brazier rivets from lots of sites. These are the kind used on boats.