BIGTEDDY - 12x Powerful Neodymium Thin Bar Magnets, Rare-Earth Metal Neodymium Magnet, N45, Incredibly Strong 33+ LB Strength - 60 x 10 x 4 mm

Neodymium Magnets is one of the Rare Earth Magnet and it is the strongest permanent magnets. They are made from Neodymium (Nd), Iron (Fe) and Boron (B) material and plated in Ni+Cu+Ni for a shiny surface and good rust resistant finish. User Tips They are fragile somehow but hard too since have powerful magnetic. Never crush the magnet each other but you know, they like to crush each other in nature, or you will have smaller magnet lol. In case the magnet is broken, try to clean it up carefully like broken glass. because they are very very tiny pieces and it can scratch other metal if it does not clean completely. My personal test is when they are less than 10cm apart, there will be a force that they are attracting each other. They don't affect my iPhone, the magnet does stick to the phone, but the phone works fine. I am not professional in this field, but I personally do not recommend sticking it to the phone all the time. Widely Use: Refrigerator magnets Crafts, Hobbies, DIY projects Hanging tools, jars, signs Secure window or show curtains Hold car, RV or boat cover Science experiments

• Durable - These neodymium magnets ( NdFeB ) are Ni+Cu+Ni triple layer coated, which offer a rust resist protection and shining surface to the magnets
• Powerful - Strong Holding Power 12lbs and resistance to magnetisation. The magnet power basically last forever
• Multi-function - it is good for DIY Art, hand crafting and storage idea. It can be widely use in garage, home, office wall, misti or scientific experienments
• Easy to use - No tools required. Quick and easy to assemble. Put them on any magnetic surface. No drill. No holes. No mess.
• User Tips - Be careful when seperating them apart and putting them together, the magnet would be fragile when they crash each others