Master Links are Used to Connect Each End of an Open Loop to Create a Closed Loop Chain.
You Could also Need a Master Link to Repair Chains.

Chain Pitch: 520
Master Link Type: Clip 

Fitment:
--Fits Dirt Bikes with a Standard 520 Chain.
--Honda Kawasaki Suzuki Yamaha CR XR CRF KX RM RMZ YZ

Package Included:
2 x Chain Master Link
(Master Link Kit includes Link, Link Plate, and Clip. Come with 2 Complete Links)