RAM Mounts Vibe X-Grip Phone Holder With Stem And Vibe Safe Adapter The RAM X-Grip Phone Mount with Vibe-Safe and Fork Stem Base is engineered for durability and stability, incorporating the X-Grip Phone Mount with an innovative Vibe-Safe vibration damping accessory to safeguard your device against harmful vibrations. This assembly includes a pre-installed device tether for added security during outdoor adventures, a compact B size arm for optimal positioning, and a RAM Motorcycle Fork Stem Ball Base for versatile fitment. Designed to accommodate a wide range of handheld devices, it is advisable to verify compatibility with your device's dimensions, including any cases or skins. Features: RAM Vibe-Safe dampens a wide range of vibration frequencies Designed to fit into the cylindrical bore wall of fork stems Made of high-strength composite and stainless steel hardware for durability and reliability in the most demanding environments Unique structure and thoughtfully designed with all industries in mind Backed by a lifetime warranty Includes: (1) Optional Tether (1) Glue Tube for Rubber Caps (1) Expansion Plug for 12mm - 38mm (.5 - 1.49) Fork Stem Holes (1) M5 x 60mm Machine Screw (1) Steel Washer Set (1) Nut Pocket Washer Set (1) Brass Nylock Nut