The Chain Doc from Muc-Off is a tried and tested, excellent and environmentally friendly chain cleaning machine. It cleans your chain easily, thoroughly and, above all, quickly. The brush wheels reach between the individual chain links and clean the hard-to-reach gaps super clean. The Chain Doc is designed for use with the organic chain cleaner. Simply place it on the can - and the miracle weapon is ready to get your chain clean in less than 20 seconds.