Open control chain with rivet lock - Manufactured by DID, made in Japan - OEM quality - Control chain locks are also available separately. Please do not use BorgWarner locks with DID or Tsubaki and vice versa. Installation: Simply open the old control chain and connect it 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.