CMS magnetics Powerful Cup Magnets 100 LB Pull Power Mounting Magnets in Large 3.2 Diameter w/Countersunk Hole Pot Magnets RB80 3 Pieces

Strong Holding Power: Using a high quality grade 8 ceramic magnet, this magnet is capable of holding up to 100 lbs
Durable Design: The Magnet is Protected by the Chrome Steel Cup so It is much more durable than a Regular Permanent Magnet. Great for Any Holding Purposes, like Car Top Signs, Antenna Bade, Light Base Fixture
Designed to Increase Holding Power: The Steel Cup and the Ceramic Ring Magnet Concentrate Magnetic Field on the Opening Side So the Holding Power is Quadrupled.
Convenient Center Hole for Easy Installation: This Magnet can be Easily Attached to other Device with a Screw so to Magnetized it and Easily Hold onto Any other Magnetic Surfaces.
Unlimited Applications: Holding, lifting, Magnetic Base for Fixture, Magnetic Retrieving, Magnetic Fishing, Treasure Hunting, and Much More