The Shimano SM-CN910-12 Quick-Link master link is compatible with Shimano 12-speed HG chains, e.g. CN-M9100 or CN-M8100. It ensures easier and faster assembly than would be the case with a chain that uses chain pins. However, the SM-CN910-12 can only be used once.
Wears and functions like other links on the chain
SIL-TEC surface treatment
Single use
Shimano chain pins.Specifications:Color: Silver Drivetrain Speeds: 12Reusable: No