The Shimano XTR CN-M9100 is a high-performance 12-speed mountain bike chain designed for use with Shimano&';s 12-speed drivetrain components. The chain is made from a durable alloy steel and features Shimano&';s SIL-TEC surface treatment, which helps to reduce friction and extend the chain&';s lifespan. One of the key features of this chain is the included Quick-Link, which makes installation and removal of the chain much easier than traditional methods. The Quick-Link is a reusable, tool-free connector that allows you to quickly and easily connect and disconnect the chain without the need for any special tools.