The RAM flat surface/bolt down mounting bracket for the Garmin Montana & Monterra series uses a 2.5” diameter screw/bolt down base with a 1” ball, a 2.47” double socket arm and a cradle specifically designed to fit the Garmin Montana / Monterra models. The rubber ball and socket design allows almost infinite adjustment so you can view it from any angle. Mount it on your boat, ATV, side by side, or golf cart; this mount will hold up on any adventure. The mount is made of powder coated marine grade aluminum, is ultra durable, dampens shock and vibration, and comes with a Lifetime Warranty. The RAM mounts are Made in the USA.