Strengthen your swing connections with the Large End 5/16″ x 4″ S-Hook. A classic of swing hardware, these are sure to slip fairly easily through the chain and seat to create a secure connection. Close them with the S-Hook pliers for maximum safety. S-Hooks require more attention that more common shackles, however, certain pieces such as the 5′ Soft Grip Chain can only be used with them. The Large End versions of this S-Hook allows for extra space for moving around and attaching the swing and chain.