Very nice! Looks like it can do the job. Providing you can torque the nut, without stripping it out.
Let us know if it can straighten bent filter rings.
There are a couple of versions by different sellers. Some may have less expensive shipping.
There is also one with a T handle so the wrench isn't needed.
I have a half circle of oak and use a small hammer to tap the wood. I have fixed several Yashica GSN's that way but it does leave a slight crinkle out the outside. But filters fit with no problems.
if i were to have designed the tool I guess i probably would have used finer threads so you could accommodate a higher torque load across the tool... a bit hit and miss too - to insist on using 'cloth' on the inside of the flange when you've got such aggressive threads cut in the bearing surface of the tool itself. I bet it really mangles up the threads or they wouldn't have cut them and THEN suggested using the cloth... just speculating of course - seems reasonable though...
Brain with informational vacuum needs knowledge... are all filters threaded with a standard thread pitch. And so is the tool providing a matching thread where it will press on the threads?