The Universal X-Grip Holder With U-Bolt Mount consists of a double socket arm, hardware for mounting to both brake / clutch reservoirs and rails that are 0.5" to 1.25" in diameter, and the Universal X-Grip™ cell phone holder. Designed into the mount is a 1" diameter patented rubber ball and socket system with adjustment points at both ends of the socket arm; this, with a twist of the arm knob, allows you to move the X-Grip™ mount to your optimum viewing position. The mounting hardware for brake / clutch reservoirs includes both standard and metric mounting bolts. The included X-Grip™ cradle has a clean and clever four leg design that sports great holding power without hiding your phone behind foam pads and plastic. The spring-loaded X-Grip™ holder expands and contracts, allowing for a perfect custom fit of your cell phone. The perfect compliment to the modern sleek interior of today's vehicles, the RAM X-Grip™ is the cell phone holder evolved. Features: Rustproof. High-strength composite and stainless steel construction. Spring-loaded holder expands and contracts for perfect fit of your device. Rubber-coated tips will hold device firm and stable. Socket technology allows for multiple adjustment angles and articulation of device. Material: Powder-coated marine-grade aluminum, marine-grade stainless steel components and high-strength composite. Ball size: 1" rubber ball "B" size. Lifetime warranty. Notes: To see if the Universal X-Grip Holder With U-Bolt will mount to your motorcycle, check the hole spacing of the base against your clutch / brake reservoir. The holes centers have a minimum width of 0.94" and a maximum of 1.58". The X-Grip™ holder is compatible with handheld devices that will fit the dimensions listed at bottom. It is important to verify the dimensions of your handheld device with a case / sleeve / skin when determining the overall size. Detailed Specifications: Cradle Dimensions: Minimum width = 1.875" (minimum height = 4.25"). Maximum width = 3.25" (minimum height = 2.25"). Depth = 0.875".