$"16 precision conical bevel gears that smoothly counter-rotate with the touch of a finger. The original cog ring can be worn on fingers or thumb for one-handed motion. Hard-wearing stainless steel with a polished or satin dark grey finish. Note that the satin finish may wear to a polish on the contact surfaces and moving parts over time, without becoming loose or jamming. Parts are individually machined and matched, then \"run in\" for smooth and light motion, which improves further with wear. R Gear Mechanism, Cosmic Ring, Gear Ring, Bevel Gear, Puzzle Ring, Wire Jewelry Rings, Fun Jewelry, Polish Silver, Spinner Rings$