I bought some like Matt Emig Chux (look at the pict), a year
ago. Large Caps, 7 link chain and thin light wooden handles.
Too much weight in the middle of the chux. Very hard to
control on wristrolls.
First thing i did, was to exchange the chain.
Have a closer look at last chain link, where it's
connected with the ballbearing-cylinder.
Push the spring pin through the cylinder, so
you can release the chain. I exchanged it with
a lighter chain to get the weight off the center.
> Still too much weight in the center, because
the handles were untreated (natural wood),
so i ripped off the mirror base film, varnished
them about 5 times to get some weight on the handles.
Finally i stucked some mirror film around the handles again.
Much better now, but i don't know if they were worth 50 $

I got some XMA-graphite chux also, i would rather
recommend. Just need to exchange the chain with a lighter
one and they are pretty cool, compared with those on the pict !