Backing Plate for bolt pattern 6.5"W x 5"H for 5/16" hardware by 3 1/8" x 3 1/8" square bolt pattern Set of Backing Plates for (Fen Dock System) includes 2 of 5/16-9 Set
You will need one set of Backing Plates for each complete HitcHinge 5-USA# 5/16-1
Hardware not included
Shipping extra