Heavy Duty - The 1 inches double ball mount is a heavy duty multi-angle drill base pedestal mounting solution for tablets, cell phones, fish finder and more. It is designed to install directly on a table, cart, desk, in a vehicle, boat, or on any flat surface. Universal Design - Includes two round ball bases and B size 3.5" length double socket arm; The ball and socket technology allows for near-infinite adjustability. Perfectly fits 1 inch / B size / 25 mm adapters and arms, compatible with RAM Mounts, Arkon, iBolt and others. Sturdy and Durable - Constructed of Powder-Coated Marine-Grade Aluminum and Stainless Steel Hardware. The mount has been Salt Spray Tested for thousands of hours (including stainless steel bolts and springs) to resist high salt water corrosion. Cast in one piece of aluminum rather than screwed together, it remains strong and durable even in the harshest environments. Industrial Grade Manufacturing Standard - Industrial-grade manufacturing standards ensure firm connections and protect your equipment. Drill-down mounting solution, choose either round plate featuring the AMPS hole pattern for attachment to compatible device holders (screws NOT included). Compatible with Garmin: Striker 4, Striker 4dv, Striker Plus 4cv, Striker Vivid 4cv, echo 100, echo 150, echo 300c, ECHOMAP Plus 42cv, ECHOMAP Plus 43cv, ECHOMAP Plus 44cv, ECHOMAP Plus 45cv, ECHOMAP UHD2 6". Heavy Duty - The 1 inches double ball mount is a heavy duty multi-angle drill base pedestal mounting solution for tablets, cell phones, fish finder and more. It is designed to install directly on a table, cart, desk, in a vehicle, boat, or on any flat surface.