The "GrapplerPlus" - This 2" spacer block is used to position the toggle clamp even further under your desk or table. This allows the toggle clamp foot to bypass a lip, notch, or any other protrusion or indention on the underside of the edge of your desk, in order to attach your mount more securely. Please be sure to select either "Hunter" or "Stalker" series, to match the color scheme of your Predator Desk/Table Mount.
*** A Mount Top Plate Plus is highly recommended with this attachment, to achieve the best clamp-lock to the desk/table surface. Please see our combination packages for a discounted price. ***