Red Horseshoe Magnets are made of Aluminium, nickel and cobalt alloys for powerful magnetic force. These alnico are great for heavy-duty use such as lifting, holding, sorting, clamping or retrieving steel or iron parts. This powerful u magnet weighs measures 0.98inch x0.98inch x 1.57inch (40x25x25mm)(WidexHighxLength),space between poles is 0.73INCH and the cored hole is 5mm(0.19inch), it can pull 25 pounds. NOTE: please make sure that the width of your thumb matches the distance between the poles before buying. These Horseshoe magnet for nails have a smooth with a hole on top for attaching to conveyors, racks, welding jigs, and other applications. And also has a removable keeper to retain magnetic magnetism.The magnetic keeper can be removed when in use to maximize the magnetic force of the magnet horseshoe. Strong Alnico horse shoes magnet has the characteristics of high temperature resistance and can not demagnetize at the working temperature of 300, which makes this magnet very suitable for high temperature application. These heavy-duty u magnet for nails are used to science investigations,classroom labs,home school,lifting, holding, even magnet for nails, strong magnetic force helps you to easily and quickly create a long-lasting effect in a short period of time. Color: Red Material: Metal Package Contents: 1pcs x u magnet for nails 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.