Prevent damage to your rod holder or even your boats gunnel with CE Smiths 80 Series Rod-Holder Backing Plate. Made of 316L stainless steel, this plate distributes mounting-bolt pressure evenly over 30 times more surface area than when using standard washers alone. Compatible with all 80 Series rod holders. 4.25H x 6W x 016D. Type: Rod Holder Backing Plates.