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.Key Features:Deep cleans your bike chain with minimal effort.,Completely eliminates chain grease and grime.,Free from dangerous chemicals.,Suitable for all chain types.,Long lasting nylon bristles.,Comes with Bio Chain Cleaner.,Quick and Easy to use.,Biodegradable..Directions for Use:Step 1 - Position bike upright or mount in a workshop stand. Shift chain to middle front chain ring and third smallest cassette for optimum chain tension.,Step 2 -Hold the chain cleaning machine in your left hand with your thumb over the spray button and forefinger over the Chain Doc trigger. Position the open Chain Doc over the chain.,Step 3 - Pull trigger to close the Chain Doc. Spin pedals backwards for 2 to 3 revolutions while spraying chain cleaner through Chain Doc. Continue for a further 2 to 3 revolutions without spraying.,Step 4 - Rinse Chain and chain cleaning machine thoroughly with clean, fresh water..