Chain doc chain cleaner the muc off chain doc eliminates grime from bicycle chains with minimal effort this life saving chain cleaning machine works by clipping over the chain and combining heavy duty rotating brushes with the awesome power of our muc off bio chain cleaner it will bring your chain back to life in seconds 19 to be exact the chain doc comes complete with a can of muc off bio chain cleaner making it ready for cleaning straight from the box unfortunately we are unable to