The umbrella holder can hold any 13-35mm diameter tubes and connects to the Super Convi Clamp base through the M size (6") Super Knuckle Arm. The umbrella holder can hold an umbrella, a flag, a walking stick, a rod shape action camera, a flashlight or any other long cylindrical objects. The ball head on either end of the arm allows users to freely adjust the angle of mounted items and can be locked into position by tightening the central knob. The Super Knuckle Arm is equipped with a hex stud that can be inserted into the built-in female socket of the Super Convi Clamp. The Clamp can be securely mounted onto most rails or tubes with external diameters from 0.2 to 2 inches (5-51 mm). The included plastic saddle can be attached to the Super Convi Clamp to securely hold onto tables between 0.2-1.2" (5-30 mm) thick. The user-friendly Clamp is easily secured and removed efficiently. This set mounts an umbrella, a flag, a walking stick, a rod shape action camera, a flashlight or any other long cylindrical objects anywhere within a flexible 6" (15.2 cm) radius.