Securely mount side legs to the inside or outside of the dock frame without deforming wood causing bolt loosening and dock shifting. Kit includes 2 side leg holders and 4 backer plates. 11 Gauge 1/8" (nominal) hot dip galvanized steel with 7/16" holes for 3/8" carriage bolts. Requires 8 x 2-1/2" x 3/8" carriage bolts, lock washer and nuts (not included).