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 are the and have a hole on the top for connecting to conveyor belts, racks, welding fixtures and other applications, and a removable retainer to maintain magnetism 1. from pacemaker 2. If decompose, discard it immediately 3. Strong magnetic properties, be careful to hurt your fingers Colour: Red Material:iron style: C 30 lbs tension + 22 lbs tension + 13 lbs tension Package Contents: 1 * horseshoe magnet Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.