RAM Mounts Tough-Claw Ball Base 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. Ideal for mounting smart phones, tablets, Gps, and action cameras. Clamping Range (Rail/Tube Surfaces): SM: 0.625 to 1.5 MD: 1 to 1.875 LG: 1 to 2.25 Clamping Range (Flat Surfaces): SM: 0 to 1.14 MD: 0 to 1.6 LG: 0 to 2.2 Physical Dimensions: SM: Height: 4.25 Width: 1.18 MD: Height: 5.25 Width: 1.56 LG: Height: 6 Width: 2.25 Features: High strength glass filled nylon construction with corrosion resistant stainless steel hardware Rubber pads provide stable, even gripping and protection of mounting surface Clamp jaw is configured for round, flat and odd shapes Quick installation and removal of Tough-Claw Lifetime Warranty Made in U.s.a. High strength composite and stainless steel hardware 1 rubber ball B size Part Numbers: Rap-B-400U Rap-B-401U Rap-B-404U