Chain lock 1/2 x 1/4, for 420 chain - Esjot in highest quality

Chain lock with dimensions 1/2x1/4" for 420 chain. The 420 designation is the most common chain on Japanese mopeds, but is used on many different ones. Esjot is a major manufacturer of fantastic sprockets in Germany, but also has equally fantastic chains manufactured in Japan with the same high quality.