LOVIMAG Neodymium Disc Countersunk Hole Magnets, 1.26 inch x 0.2 inch Strong Permanent Rare Earth Magnets with Screws - Pack of 12;

LOVIMAG Neodymium Countersunk Hole Magnets - 1.26"D x 0.2"H (12 PCS)
Rare earth magnets are the strongest type of permanent magnet currently made. They are amazingly powerful for their size and have innumerable uses. These pot magnets are 1.26 inch (32mm) diameter and 0.2 inch (5mm) thick.
They are magnetized through the thickness. They are composed of neodymium iron boron magnetic material and are plated in nickel-copper-nickel for a shiny corrosion resistant finish. Maximum working temperature is 176 F (80 C).

Ideal for furniture fixings, hanging artwork and keeping doors and drawers closed, countersunk magnets have a central hole which allows them to be fixed to non-magnetic surfaces with a screw.

Because of their superb strength these 32mm x 5mm countersunk circular magnets are also used in recovery and retrieval applications, providing an astonishing magnetic pull for a relatively small magnet.

Countersunk magnets with opposite poles on the countersunk face can be used to attract two surfaces or two opposing countersunk magnets with the same pole on the countersunk face can be used to create a damping, shock absorbing or repelling effect.
Also available with the north pole on the countersunk face.

Warning
1. Keep away from pacemakers.
2. Powerful magnets can hurt your fingers.
3. Not for children, parental supervision required.
4. All magnets may chip and shatter, but if used correctly can last a lifetime.
5. If damaged please dispose of completely. Shards are still magnetized and if swallowed can inflict serious damage.