Interesting tool, basically someone took a set of heads from a squeeze riveter and modified it for a c-clamp.

Pro's
1 purchase
Self contained
Great for squeezing 1/8 inch tube rivets within the depth of the c-clamp throat

Con's
Only does 1/8 inch rivets
Limited to depth of c-clamp throat (unless you make or modify a c-clamp)
A bit pricey at $90

IMO buying the rivet sets is cheaper and more versatile in the long run, though this is another option for someone looking to do refurbishment if it suits your needs.