Designed for High Salt Marine Environment - The mount has been Salt Spray Tested for thousands of hours (including stainless steel bolts and springs) to resist high salt water corrosion. 
Super Sturdy - Constructed of Powder-Coated Marine-Grade Aluminum and Stainless Steel Hardware. Cast in one piece of aluminum rather than screwed together, it remains strong and durable even under the impact of waves.
Universal Design - Multi-angle drill base pedestal mounting solution for fish finder, GPS chartplotters and more. The AMPS hole pattern is designed to install directly in a boat, kayak or on any flat surface (Complimentary 4 sets of 316 marine grade stainless steel machine screws, lock nuts and sheet metal screws). Includes a B size 3.5" length 1" double socket arm and a complete flat surface, drill-down mounting solution; The ball and socket technology allows for near-infinite adjustability. 

Compatible with Garmin GPSMAP 162, Garmin GPSMAP 168, Garmin GPSMAP 175, Garmin GPSMAP 180, Garmin GPSMAP 180C, Garmin GPSMAP 182, Garmin GPSMAP 185, Garmin GPSMAP 188, Garmin GPSMAP 232, Garmin GPSMAP 238, Garmin Striker 5 Series, Garmin Striker Plus 5cv.