Box One by 11 Groupset with Sunrace cassette and KMC chain.
Box One 11S Rear Derailleur
Adjustable Tri-Pack Limited Slip Clutch™
The Adjustable Tri-Pack limited slip clutch™ is an innovative chain damper that vastly reduces derailleur cage bounce and chain slap. The system also maintains tension for better chain wrap. At its core is a clutch pack, that is capable of providing a large amount of force in a small package. Clutch force can be adjusted to give the user the ability to tune their setup to the desired balance of shifter feel and chain retention. This version is also serviceable.