That's the problem with crap like that. Well meaning people buy them as gifts. It's the same for motorcyclists, they think anything with "Harley" emblazoned on it is a good gift. I have 2 Hondas and a BSA. My last Harley was a 57 panhead 20 years ago, and it's probably my last unless I find an old VL in a barn. I have been given enough Harley T shirts and bandanas to open a store, but i just re-gift to people who fall for the brand name recognition. No sense in being ungrateful.
I really got a kick a few years back watching Bob Villa (an admitted carpenter) selling magic pliers. On the commercial you could actually see the damaged hexes on the bike wheel as the actors faked assembling a bicycle. A few years later, he is hawking a weird "reverse easyout" to remove the nuts you wrecked with the pliers. The C-clamp is kind a cool, but a unit that uses a drill battery would be better. You could use one battery for a whole set of clamps.