The RAM-HOL-UN10BU has a clean and clever four leg design that sports great holding power without hiding your phone or tablet behind foam pads and plastic. Compatible and interchangeable with a wide range of popular RAM Mounting products. Includes a device tether recommended for rugged applications Will fit devices that are minimum width of 1.75" (minimum height of 5.5") and the maximum width of 4.5" (minimum height of 3.25") Depth is .875" Here are a few arms that we recommended: 753-329, 222-239, or 753-330 Recommended bases 753-930, 753-929, 753-332, or 753-334