RAM Torque 3/8″ – 5/8″ Diameter Mini Rail Base with 1″ Ball, Short Arm and X-Grip for PhonesTake your mobile entertainment on the road with the new RAM Torque handlebar and rail mounting base. Weve paired a B-sized 1 rubber ball base that accommodates bars 3/8″ – 5/8″ in diameter with a B-sized short length arm and the dynamic X-Grip for phones. Sizing inserts are included to provide a snug fit and offer additional protection for the rail. Weve paired this mount with the dynamic X-Grip. The mount utilizes nylon-insert locknuts to prevent loosening in high vibration environments. This low-profile mount is the perfect way to secure your personal electronics and small accessories in any high-vibration environment.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 of 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.Mounting Base Dimensions:Accommodates rails 3/8″ to 5/8″ in diameterCradle DimensionsMinimum Width = 1.875″ (Minimum Height = 4.25″)Maximum Width = 3.25″ (Minimum Height = 2.25″)Depth = 0.875″Features:1. Rustproof2. Spring loaded cradle expands and contracts for perfect fit of your device3. Rubber coated tips will hold device firm and stable4. Socket technology allows for multiple adjustment angles and articulation of device5. Includes Tether for open cockpit and extreme environments6. Lifetime warranty7. Made in U.S.A.Material:Powder Coated Marine Grade Aluminum, Marine Grade Stainless Steel Components & High Strength CompositeBall Size:1″ Rubber Ball “B” Size