HM003-SBH is a high-quality universal car or truck seat headrest mounting pedestal (not a complete solution; holder not included) with a limited lifetime warranty. This mounting pedestal can be used as a replacement, upgrade, or as an addition to a current mounting pedestal. It is compatible with Arkon's universal smartphone and tablet holders (sold separately), including the Slim-Grip Universal Tablet Holder (TAB001), Universal Tablet Push Button Holder (TAB003), and Slim-Grip Ultra Universal Smartphone and Midsize Tablet Holder (SM060-2). This mount package includes only Arkon's 2-post car seat headrest mount (holders sold separately). When paired with a holder, this headrest mounting pedestal is ideal for multiple passengers who want to view a smartphone or tablet in the center of the back seat. It easily attaches to your car or truck's front or back seat 2-post headrest, and features an adjustable-length rigid extension arm that extends from 15 inches to 24 inches. For complete mount solutions (with holder) featuring the HM003-SBH, Arkon recommends the Slim-Grip Universal Tablet Headrest Extension Mount (TAB3-RSHM) for tablets, or the Slim-Grip Ultra Universal Headrest Mount (SM6HM3) for smartphones or midsize tablets.