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 in. - 1. 5 in. 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 Pending Clamping Range (Rail/Tube Surfaces): 0. 625 in. to 1. 5 Range (Flat Surfaces): 0 in. to 1. 14 in. Physical Dimensions: Height: 4. 81 in., Width: 1. 18 in. Quality marine product. Limited warranty. Size: small.