Standard master link used to connect different lengths of O-Ring 420 Chain. This is an extra master link is used to connect lengths of O-ring 420 chain, as used on the Sur-Ron X (unmodified), perfect if you snap your chain and need just a tiny bit more extension or to join to bits of chain together. 

Please note that this is only compatible with O-Ring Chain and will NOT work with standard motorcycle 420 chain (Used on the Sur-Ron MX and on the Sur-Ron Pedal Kit).