Buyers Products RC10S Small Rubber Clamp Use on work vehicles, off road trucks, military equip., law enforcement vehicles, fire trucks, 4x4s, ATVs, RVs, boats, or on any wall Mounts easily with one #10 bolt or screw (not included). Constructed of transportation grade rubber. Each clamp supports approx. 22 lbs. Holds objects between 1/2" to 2-1/2" in diameter.