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). Rock Solid - Use the most reliable materials to manufacture. Made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments. 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. Features 1 inch / 25mm / B Size Ball joints that are compatible with all industry standard 1 inch / 25 mm / B size adapters and arms. 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.