Wide Range of Applications - The AMPS hole pattern matches many electronic devices and mounts, including iPad mounts, tablet mounts, cell phone mounts, fish finders and more. The down-drilled mounting base mounts directly on a table, cart, desk, in a vehicle, agricultural truck, boat, or on any flat surface (complimentary 316 marine grade stainless steel screws). | Multi-Directional Rotation - Adjust the direction of the 1.5'' ball adapters with the up and down knobs. Adjust the direction of both arms with the centre knob. The ratchet arm provides more adjustable direction and prevents the centre point from rotating in harsh environments. | High-Quality Materials - The 1.5'' ball adapters are made of Marine-Grade Powder-Coated Aluminum that is strong, hard-wearing and corrosion-resistant. The double socket arm and ratchet arm are made of high-performance composites, which is sturdy and lightweight, reduces leverage on the device and reduces shake. | Universal Design - Includes two round ball bases and C size 8.1" length double socket swivel ratchet arm. Perfectly compatible with 1.5 inches / C size / 38 mm adapters and arms from manufacturers such as RAM Mounts, Arkon, iBolt and others.