This ring is for anyone that knows their
way around an engine. The ring not only looks cool, but the
piston actually works! When the thumbwheel is rotated
around, the piston goes in and out in perfect harmonic motion.
The fact that it all fits on a finger makes it that much more
amazing. The ring is crafted from titanium, so water or
chemicals won't hurt it.
The ring shown was made in a size 10 and
is about 6.4mm wide.
Hover your mouse over the picture to see
the piston move.