Both strong and light weight, the RAP-B-121B clamping base is perfect for numerous electronic devices. Modular in design, switch out the clamps for a perfect fit no matter what the mounting surface, or add a second ball to mount another device. Crafted to hold firm to most glare shields, yokes, or tubing, practically any aircraft can benefit from this product. Simple to use and exceptionally versatile, RAM has created another "must have" for any pilot. Once you've had a chance to use this great little device, we're confident you'll find uses for it no matter what you fly, drive, or ride. 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. Please note that this clamp is not recommended for use with long flex arms on wheelchairs etc, the metal version RAM-B-121B is far superior for critical applications of this sort. What the RAP-B-121B fits: Rail or edge lip from 0.625" to a maximum of 1.25" Material: High Strength Composite Ball Size: 1" Rubber Ball "B" Size Note: The RAP-B-121B also accepts a second 1" removable ball, the RAP-B-121BB.