Standard mount each gps unit comes with a standard gps mount included are two sets of o rings two diameters plus a backup o ring in each size a rubber shim and an x lock composite mounting bracket the rubber shim supports the x lock mount which is engineered to attach at any 9 angle and still allow the computer to be mounted forward the two super durable o rings secure it to the bar and the patent pending x lock design will prevent the computer from being knocked out the x lock secure