853402 Cole ZX Key Chain is a Ninjago: Masters of Spinjitzu keychain that was released on March 3, 2012. It includes a Cole ZX minifigure attached to a keychain.
LEGO.com description[]
Pack a ninja everywhere you go with the Spinjitzu master of earth. This authentic Ninja Cole minifigure in black ninja gear is attached to a sturdy metal ring and chain.
- Features authentic LEGO Ninjago Ninja Cole minifigure with accessories, attached to a sturdy metal ring and chain
- Attaches to your keys or backpack.
- Minifigures are not detachable from metal chain
- Makes for a great gift to fans of LEGO Ninjago building sets.