This is an exceptionally strong, high-power industrial magnet. Hand injuries, such as severe finger pinching between the magnet and a metal surface, can occur if it is handled carelessly. Keep this product strictly away from pacemakers, automated machinery, credit cards, computer hard drives, and sensitive electronic measuring tools. Always store the magnet inside a secure wooden or insulated crate with its steel “keeper” plate firmly attached across the two poles to close the magnetic loop and shield the surrounding environment.