Primary chain joiner double crank link, 110046, 1/2 x 5/16, Renolds Synergy chain. Suits 1/2 x 5/16 Renold chain, other brands of chain may have thicker plates, longer pins and not be suitable. Suit Norton primary chains.Renold Synergy chain lasts up to 6 times the life of other brands see Renold synergy website.GY08B1S30I
