Neodymium magnets are the strongest permanent magnets we sell and the surprisingly strong force between them may cause serious personal injuries, as well as to the magnets themselves. Reviewing this checklist to help customers handle these magnets properly is strongly recommended. Powerful attraction forces can cause serious injury. Never put your fingers or any other body parts between two magnets. Neodymium magnets will slam together from several inches to feet apart, the huge impact may cause the body to pinch,