For those mariners who are looking for a sleeker installation of the GPSMAP 620 or 640 at their helm, this flush mount kit is the answer. Users can easily flush mount their GPSMAP 620 or 640 to most flat surfaces such as a bulkhead or cabin wall. It features a tilt-n-lock fastening mechanism to firmly hold the unit in place while on the water. The unit can even be securely locked into the flush mount with the included security screw tool. With the simple touch of a button the unit easily pops out of the mount for transport or storage. The included heavy duty protective cover fits the entire case snugly, protecting it from dings and scratches as well as the harsh rays of the sun.