Roller bunks make it easy to load and unload small craft at short or dry ramps. Great for ramps where it's not practical to float your boat on the water, these roller bunks come pre-assembled and pre-drilled for easy installation. Bunks may be installed using brackets if an angle is needed, bolted directly to the trailer frame for a flat-bottom boat, or mounted on top of existing bunk boards. Durable 2" polypropylene rollers on 1/2" shafts mounted in heavy-gauge pre-galvanized channel. Supports up to 1,500 lbs. of well-distributed weight.