The Scosche TerraClamp line was developed as a versatile Powersports mounting solution that features multiple mounting options for a wide range of applications. They are designed for maximum performance while securely mounting many of today's top mobile devices and Powersports accessories. Many of the TerraClamps incorporate Scosche's award winning MagicMount or MagicMount Pro XL magnetic Smartphone system. Built using quality materials such as 6061-T6 Aerospace grade aluminum and Stainless Steel hardware TerraClamps are built for long lasting durability. They come complete with the mount, base and mounting hardware. On select TerraClamp models you can even customize the mount by adding one or more 4.5” extension bars and/or “Knuckles” which provide an additional pivot joint and 1.5” extension that can swivel and rotate 360 degrees. (extensions and knuckles sold separately) TerraClamp is extremely reliable and a great mounting solution for Powersports enthusiasts..