The Stowaway Double Stack Bracket for Fish Finder Mount allows for a second graph to be mounted to any Stowaway Mounts. This mount sits at a fixed position on the outer tube. The second graph will not telescope with the top unit by keeping the weight of the second graph lower and closer to the mount center point. When Stowing your unit simply loosen the clamp knob and rotate your graph to the backside of the mount. The Stowaway Double Stack Bracket uses a copolymer split bushing to allow for smooth rotation adjustments. Note: Drilled to fit all Garmin units, Hummingbird except Helix 7, and all Lowrance units. FeaturesSits at a fixed positionCopolymer split bushing for rotation adjustmentsPre-drilled for most fish finders