The HD005 drill-base mounting pedestal can be used as a replacement, upgrade, or as an addition to an existing Dual-T pattern 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 includes Arkon's Heavy-Duty Aluminum Mounting Pedestal with 10'' Adjustable Arm and 4-Hole Drill Base featuring a Dual-T Head. Formerly an industry standard, the 4-Hole AMPS pattern consists of four holes located in a rectangular pattern spaced at 30.17mm by 38.05mm (measured as the center-to-center distance between holes). The 4-hole drill base mount is made of strong aluminum, and is ideal for environments where a more permanent solution is desirable, such as in a workshop or in retail. Screws are included. Bend the 10'' adjustable arm and rotate the swivel ball adapter head for 360° rotation for exact positioning of the device.