C.E. Smith 5' Roller Bunks [27710]5' Roller Bunk Roller bunks make loading and unloading small craft at very short or even dry ramps easy. Great for ramps where it is not practical to float the boat onto the trailer. Pre assembled and pre drilled for easy installation. May be installed using mounting brackets if lift and or angle is needed, or may be bolted directly to trailer frame for a flat bottom boat, or even mounted on top of existing bunk boards. Features: Durable 2"