Rectangular metal casing having a full three ceramic magnetic base making this part stronger than our common 3" long magnet #107037. Use this heavy duty magnet when more holding power is required. Perfect for larger upright signs or heavier displays. Two integrated mounting holes also offers additional strength benefits when attaching with screws or common 1/8" pop rivets - not included. Removable and reusable. Warning: Holding capacity is the approximate maximum pull rating under ideal conditions. Always test suitability on per-application basis. For best results, use on an indoor, bare (unfinished) metal surface that is smooth and clean. Metal conditions will affect holding power. Magnets should not be used near electronic equipment.