The RAM Mounts Self-Leveling Cup Holder with Tough Claw Base securely attaches, without tools, to any round rail up to 1.5 dia. or any flat rail up to 1.14 dia. This innovative, self-leveling drink holder uses a patented rubber-ball-and-socket attachment system and has 2 pivot points to resist shock and vibration, preventing spills even in rough conditions. Rotates 360. The Tough Claw base can be used almost anywhere such as boats, kayaks, bicycles, wheelchairs, and more. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Organization.