These special designed mounts are made to aid the Crappie Fishermen to be able to get their screen at a taller height to see them better. The critical design added to this model is it can be folded down on the deck of the boat to improve your line of sight while driving. The new design also has Rubber Bumpers that support the unit, so the Sonar will not touch the Deck. The mount comes in 2 different heights and has an integrated cup and tool holder in the mount. Your graph will mount directly to the top shelf and it has multiple hole patterns for about any graph brand.
Single mounts can be converted to a Dual Stack mount by getting the Stack Top only, which can be purchased here: Bow - Straight Single Riser / Dual Stack / Taki Top (TOP PART ONLY)