FANAUE Aluminum1'' Ball Mount Base with 4-Hole AMPS Square Plate & 1" Ball Adapter Compatible B Size Double Socket arm and Bike Motorcycle Phone Holder The ball mount square plate made of 6061-T6 aluminum alloy material with CNC machining and iii grade hard anodized surface for durability and reliability in the most demanding environments. This 1'' Ball Mount Base with B size 1" ball is compatible with RAM mounts and any FANAUE B size 1" ball double socket arm .Work for other devices with 1 inch swivel ball mounting pattern. Compatible with Garmin devices our ball mount consists of a B-size 1" TPU ball and standard 4-hole 51mm x 43mm，The square plate features industry-standard AMPS hole pattern . 1 inch stainless steel ball head is wrapped by high quality anti-slip rubber, ball joint part can be rotated 360 ° for perfect device placement. You can also assemble the assembly using one of the ball-to-ball adapters to provide additional length as well as additional articulation points for unmatched adjustability. NOTE:1 inch ball mount offers lifetime warranty