The lightweight RAP-B-121B clamping base is perfect for numerous small electronic devices. It will hold firmly to tubing, glare shields and yokes - please see instructional video at bottom of page. It also has a threaded socket for another RAM Ball. Simple to use and exceptionally versatile, RAM has created another "must have" part. Once you've had a chance to use this great little device, we're confident you'll find even more uses for it no matter what you sail, drive, or fly. You may even find yourself using your new RAM Mount on a golf cart, work bench, or even exercise equipment. With RAM, there are no limits.