YBN has created the perfect tool for removing a master link. So perfect they patented the design. The key is their "L" shaped nose ends that firmly grip each chain roller during link removal. Gone are the days of the tool slipping off the chain. If you've used a needle nose pliers or a single tool design you know exactly what we're talking about. Be sure to also purchase the YBN CLP-102 for installing a master link. Please note that the YBN tools are not compatible with Shimano master links.