This Grade 43 Clevis Grab Hook from Koch Industries can be used to easily join attachments to welded chain or rope. It has a zinc-plated finish, and has a narrow throat opening that can hook back on the chain. Note that hooks with eyes require a chain fitting to be attached to chains. This is a hook that is strong enough for most farmyard jobs.1/4" Maximum Load 2, 600 lbs.5/16" Maximum Load 3, 900 lbs.7/16" Maximum Load 7, 200 lbs3/8" Maximum Load 5, 400 lbs1/2" Maximum Load 9, 200 lbs. | Koch Grade 43 Clevis Grab Hook | Size 5/16"