SRAM Powerlock 12-Spd Eagle Chain Connector 
For Use with SRAM 12-Eagle Chains Only
No tools necessary to install
From a long line of tough, light-weight chain engineering from SRAM
Specifications:
Compat - Speed (CN): 12s-Eagle
Chain connector type: PowerLock
Color - Chain connector: Silver
Chain connector finish: Steel
Please note, SRAM recommend that the power lock is only used once 
This power lock is embossed with the word Eagle