Standard Portable offers its signature line of heavy duty industrial magnets. The #3 Stock Magnet is produced with a sturdy neodymium magnetic base that has a 30 lb pull. Neodymium magnets (also known as "rare earth magnets") are extremely high strength and low cost. This magnet is manufactured with a durable urethane rubber coating that is corrosion resistant. The base of the #3 Stock Magnet measures 2 3/8" x 1-1/8" x 2-1/8". There is a 1/4" mounting hole through the center of the magnet. Standard Portable Signature Industrial Magnets are exclusively produced in the USA at our manufacturing facility.