Check the listing for details. ProAm USA Rubber Coated Filmmaking Vehicle Magnet Mount - 2 Pack. Condition: New. Listed at 16.95 USD. Use it to mount lights, actions cams like a GoPro or use it to build your own custom car rig.Recommended to support cameras and accessories up to 3 pounds Features a standard 1/4-20 threaded insert for ultimate compatibility6 neodymium magnets, each 1/2 inch in diameterRubber coating prevents scratches on vehiclesUp to 40 pounds of vertical pulling strength per mount*ContentsTwo (2) rubber coated neodymium magnet mountsTwo (2) 5/8 inch diameter threaded spigot adaptersTwo (2) 1/4-20 double threaded adapter screws Two (2) 1/4-20 to 3/8-16 thread adapter inserts*While the vertical pulling strength maxes at 40 pounds, real world conditions reduce the operating weight limit. Mounted loads will put additional torque on the magnet. Camera and lights, when mounted, raise the center of gravity of the mount making it easier to remove. Always use a secondary method of securing the device being mounted such as a lanyard or tie-down.