Sports Umbrella Holder Umbrella Holder: Material - High Strength Plastic, Length - 13 1/2 inches, Inside Diameter - 1 3/4 inch, Large 2 1/2 inch Thumb Screw, Light Weight 13.2 oz. 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.