This 1/4″ Galvanized Steel Plate has a chain slot for anchor chain connection that can be adjusted in length. (AKA chain retainer)
It fit’s 3/8″ and 5/16″ Chain.
There are four 3/8″ bolts required for attachment of the plate.
Install this plate with the slot pointing down. The chain link will be held in the slot and can be pulled through the round part for adjustment.