It works as intended.  It works when you get it on.... therein lays the core issue.  Since i'm not Octavius from Spider Man, fitting this onto a frame while tightening it is a Major Pain in the Chunk.

When its on, its great.  You simply wind the handle and you can squeeze that frame like the feared Kraken from Ulysses.  It will creak for mercy.

BUT there are design issues.  The corner thingamabobs have a tendency to slip off.  They don't seem to grab the ribbon tight enough, so adjusting tension while doing the other 3 edges is an exercise in frustration.  Getting the corners Just Right, then winding the large retractor a Goldilocks amount, THEN winding the red handle.... man-o-man.

Its an OK tool.  It does the job, but if you are going to do this more than once, make yourself a cramping jig.  You will lose less hair.
It works as intended. It works when you get it on.... therein lays the core issue. Since i'm not Octavius from Spider Man, fitting this onto a frame while tightening it is a Major Pain in the Chunk. When its on, its great. You simply wind the handle and you can squeeze that frame like the feared Kraken from Ulysses. It will creak for mercy. BUT there are design issues. The corner thingamabobs have a tendency to slip off. They don't seem to grab the ribbon tight enough, so adjusting tension while doing the other 3 edges is an exercise in frustration. Getting the corners Just Right, then winding the large retractor a Goldilocks amount, THEN winding the red handle.... man-o-man. Its an OK tool. It does the job, but if you are going to do this more than once, make yourself a cramping jig. You will lose less hair.