RAM Mount Handi-Case with U-Bolt MountThe RAM-149Z-HC1U consists of a zinc-coated u-bolt base, double socket arm, 2.5" diameter round base, and Rugged Handi-Case. Included in this package is hardware that will accommodate rails from 0.50" to 1.25" in diameter. The base includes black cover caps to be placed over the exposed ends of the u-bolt. The included composite rail adapter can narrow the rail to a minimum width of 0.5". The mount is designed with a RAM 1.5" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allows for almost infinite adjustment and perfect viewing angles. The RAM Handi-Case is capable of doing so many tasks it will astound you.Applications: For any professional on the go, this is the tool to keep you organized at home, at the office, or on the go regardless of what you ride, drive, or fly When a briefcase is too much but a notepad, is not enough, the Handi-Case is exactly what you need Beyond just a writing surface, you get document storage, a tool holder, pen and pencil storage, and of course, RAM's rugged construction No matter where the job takes you, the RAM Handi-Case is ready to multi-task Specifications: Clamp Range (inch): .5" - 1.25" diameter Socket to Socket Length (inch): 4.66" Ball Size (inch): C Size (1.5") Packaging Type: Polybag Weight Capacity (lbs): Standard use-4 lbs. / Heavy-duty use-3 lbs. Materials: Marine-grade aluminum; High strength composite Input Connector: mUSB Female Weight (lbs): 3.42 lb Hardware Included (inch): Assembly Hardware (1) 1/4"-20 U-Bolt for .5" - 1" Rails (1) 1/4"-20 U-Bolt for 1" - 1.25" Rails (2) 1/4"-20 Nylock Nuts (2) Rubber Caps (1) U-Bolt Spacer