Double U-Bolt Fixed Base with 1.5" Ball. Suitable for Round Tubes and Half-Round Tubes with diameters ranging from 0.5in to 1.3in. Compatible C-Size 1.5-inch Ball Double Socket arm
So Sturdy and Durable - Constructed from Marine-Grade Powder-Coated Aluminum and tested for thousands of hours in salt spray to ensure reliability and stability in the harshest environments. 1.5" Ball Made of Marine-Specific, High-Strength Composite Material, which is more resistant to high salt water corrosion and less prone to deformation than rubber. Provides the same friction as rubber.
The double-U structure is more stable
Suitable for motorcycle handlebars and bicycle handlebars, can be combined with two arms to form a mobile phone holder or camera holder