Using this Wera chain riveter set is a breeze. First, open the sturdy folding pouch to access the tools. If you need to open a bicycle chain, use the chain riveter. Place the chain in the appropriate slot and turn the rivet - pushing mechanism to separate the chain. To close the chain, use the chain fastener. It's important to note that this set is compatible with single - speed to 12 - speed chains, so make sure your chain falls within this range. When you're done using the tools, put them back in the folding pouch right away to keep them organized. For maintenance, wipe the tools clean after each use to prevent dirt and grime from building up. Store the set in a dry place to avoid rusting. With proper use and care, this set will serve you well for a long time.