Super Quick Fist Clamp for mounting tools & equipment 2-1/2" - 9-1/2" diameter Holds objects 2-1/2-inches to 9-1/2-inches (64 to 241 millimeters) in diameter Each clamp supports 50 pounds (23 kilos) Not affected by hot or cold climates UV resistant; made of heavy duty transportation grade rubber Mounts with three #10 screws or bolts (not included)