RAM Drill Down Mount for Garmin GPS 72, 76, 96, and GPSMAP 72 & 76S RAM Drill Down Mount for Garmin Approach and Dakota 10 & 20 RAM Drill Down Mount for Lowrance AirMap 600C, iFinder & iWay 100M (RAM B 138 LO3U) (sku 54267) RAM Drill Down Double Ball Mount with Hardware for Garmin GPSMAP RAM Composite Drill Down Mount for Garmin GPSMAP 76 & 96 Series RAM. HARDWARE INCLUDED Assembly Hardware SOCKET TO SOCKET LENGTH 3" HOLE PATTERN 4 Hole AMPS: 1. 181" x 1. 496" 3 Hole 120 Degree: 1. 812" Diameter PLATE SIZE 2. 5" Diameter