The RAM Tough-Claw is the perfect mounting base for quick and easy tool-less installation and removal on round, square, odd shaped rails and bars. The Tough-Claw can be clamped on rails from 1" to 1.875" outer diameter. Ideal for mounting tablets, action cameras, smartphones, rod holders for rod storage and much more in a wide variety of applications. Perfectly suited for mounting on the yoke of an aircraft, handlebars and seat posts of bicycles, kayak rails, roll bars and much more, the RAM� Tough-Claw will soon become another essential RAM component in your collection of mounting options. Clamping Range (Rail/Tube Surfaces): 1" to 1.875"Clamping Range (Flat Surfaces): 0" to 1.6" Physical Dimensions: Height: 5.25" Width: 1.56" Features: 1. High strength glass filled nylon construction with corrosion resistant stainless steel hardware 2. Rubber pads provide stable, even gripping and protection of mounting surface 3. Clamp jaw is configured for round, flat and odd shapes 4. Quick installation and removal of Tough-Claw� 5. Lifetime Warranty! 6. Made in U.S.A.