This motorcycle mount makes attaching to handlebars, tubing, or railing a breeze. Simple to install and easy to use, the possibilities become endless. The zinc coated metal u-bolt and nuts included are designed it fit motorcycle handlebars, or circular rail that are 0.75″ to 1.25″ in diameter. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. High quality materials insure your GPS is safe, secure, and within easy reach. RAM’s patented design also dampens shock and vibration helping to extend the life of your mobile device. This mount is designed to hold the following devices: Garmin nuvi 800 Garmin nuvi 850 Garmin nuvi 855 Garmin nuvi 860 Garmin nuvi 880 Garmin nuvi 885T Material: High Strength Composite & Powder Coated Marine Grade Aluminum Ball Size: 1″ Rubber Ball „B” Size Note: Part number reflects product packaged in clear clam shell for store shelf display. Related Links:RAM GPS Mounts PageRAM Motorcycle Mounts Page RAM® double socket arms with their distinctive hour-glass shape are designed and recognized to provide the best possible performance for most any application.