The RAM-B-174-UN7U consists of hardware for mounting to either brake/clutch reservoirs and rails that are 0.5" to 1.25" in diameter, a double socket arm, and a universal X-Grip® cell phone cradle. 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® cradle expands and contracts, allowing for a perfect custom fit for your cell phone. The perfect complement to the modern sleek interior of today's vehicles, the RAM X-Grip® is the cell phone cradle evolved. The X-Grip® includes a device tether recommended for outdoor applications. The cradle is compatible with handheld devices that will fit the dimensions listed below. It is important to verify the dimensions of your handheld device with a case/sleeve/skin when determining the overall size.Specifications: CLAMP RANGE: 0.5" (12.7mm) - 1.25" (31.7mm) diameter HOLDER DIMENSIONS: Width Range: 1.875" (47.6mm) - 3.25" (82.5mm), Depth Range: 0.875" (22.2mm) max SOCKET-TO-SOCKET LENGTH: 3" (76.2mm) BALL SIZE: B Size (1", 25.4mm) Assembly Hardware Included: x1 Optional Tether x1 Glue Tube for Rubber Caps x2 M6 x 55mm Hex Bolts x2 #1/4-20 x 2" Hex Bolts x2 1/4"-20 x 2.5" Hex Bolts x2 1/2" Spacers x2 1/4" Split Lock Washers x1 1/4"-20 U-Bolt for .5" - 1" Rails x1 1/4"-20 U-Bolt for 1" - 1.25" Rails x2 1/4"-20 Nylock Nuts x2 Rubber Caps x1 U-Bolt Spacer