The item "Chain master link Delta 420 (10 pcs)" is a chain master (connecting) link for Delta mopeds. The connecting link joins the ends of the drive chain; the number in the name is the chain pitch.
It is needed when shortening or repairing the chain and when the master link is lost. Install the link with the open side facing against the direction of chain travel. Manufacturer: TATA; country: China. Before buying, compare the part with the old one for appearance and mounting points.
