This is a KMC "Drop Buster" chain - stretchproof chain with mushroom rivets and thicker side plates.
* 1/2" X 1/8
* "Neo chrome" finish (others call this Jet Fuel or Oil Slick)
* Model number is Z510HX
* 113 links
* Comes with built in offset link and master link (both of which are NICKEL - not the oil slick finish)
* Great stretchproof chain for any single speed application (BMX, Fixie, cruiser, etc.)