Join dock sections or a fixed ramp to the dock at varying angles. Kit includes 2 hinge sets and 4 backer plates. 11 Gauge 1/8" (nominal) hot dipped galvanized steel with 7/16" holes for 3/8" Carriage Bolts. Requires 16 x 2-1/2" x 3/8" carriage bolts, lock washer and nuts (not included).