20x4 mm Round Drilled Magnet N52 Powerful Magnets 8kg Magnet Holes for Magnetic Blackboard Kitchen DIY Tools 10PCS Screw Magnets <p>【Magnet Size】The magnets measure 20mm in diameter and 4mm in thickness and are coated with three layers of nickel, copper, and nickel to reduce corrosion and provide a smooth surface that significantly extends the life of the magnet. Round rare earth magnets are used in a wide range of applications.</p> <p>【Durable】Nickel. The three-layer copper-nickel coating is a robust shield for small bodies, it can be used for many years and remains fully functional.</p> <p>【Easy to Use】 The round pot magnets can be directly attached to magnetic materials and can be screwed onto non-magnetic materials. Robust and reliable. When separating the magnets, be careful and slide them gently.</p> <p>【Versatile Use】Ideal for organizing your tools, keys, kitchen, refrigerator and all metals, storage bags, jeep jockey, wrapping copper tubes or holding upside down plastic doors.</p>