Our Aluminum Nicoal Magnets are made of aluminum and cobalt alloys and are made for heavy duty use without demagnetization naturally over time, which helps lift, hold, sort, clamp or retrieve steel or iron parts. It can also be used as velvet nails (please confirm that the width of the thumb matches the space between the rod before purchasing), fishing, measuring, collecting small metal screws, doing experiments, etc. These horseshoe magnets have a hole on the top for connecting to conveyor belts, racks, welding fixtures and other applications, and a removable retainer to maintain magnetism. From pacemaker. If decompose, discard it immediately. Strong magnetic properties, be careful to hurt your fingers. Colour: Red. Material: Iron. Style: A 30 Lbs tension. Package Contents: 1 x horseshoe magnet. Only the above package content, other products are not included.