For floating dock applications where an outside corner is not necessary. Includes 4 heavy duty inside corners and 4 backer plates. Requires 32 x 2-1/2" x 1/2" carriage bolts, lock washer and nuts (not included).,For stationary dock applications where an outside corner is not necessary. Includes 4 heavy duty inside corners and 4 backer plates. Requires 32 x 2-1/2" x 3/8" carriage bolts, lock washer and nuts (not included).