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 0.625" - 1.5" 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. Patent PendingClamping Range (Rail/Tube Surfaces): 0.625" to 1.5"Clamping Range (Flat Surfaces): 0" to 1.14" Physical Dimensions:Height: 4.25", Width: 1.18"