Adjust to correct gate sag. Includes 2 washers and 2 nuts per hook. Full threaded hook is bolted through the post and firmly secured with standard size nuts and washers on each side. As a replacement part: use with National's 292 Bold Hook. For new installations: use with National's #294 Hinge Straps. Use with the Stanley/National Strap size 14"(N130-799), 16"(N168-336), and the 18"(N248-039).