Often times all that is needed to get your hook back in shape is a new latch kit, and a latch kit is much cheaper than buying a whole new hook. These latch kit assemblies include the latch itself, and the necessary pins for quick and easy installation. The RDGKN/OKN series of latch kits fits the following hooks (old-style Grade 80 models): GK, GKN and/or OKN (except the 5/8" and 3/4" models).