DID control chain - Made in Japan - Chain pins made of carburizing vanadium The chain pins of these DID control chains are by a special surface treatment hardened and allow up to three times longer service life than conventional control chains - PLEASE DO NOT USE THE BRACKET OF THE BRACKET FOR THE BRANCHES ONLY! Installation: Simply open the old control chain and connect to the new control chain, pull through and then rivet the new control chain. This saves you several hours of work, since the engine does not have to be disassembled completely.