20mm in Diameter x 2mm Thick. 20mm Dia x 2mm Thick = 2.34kg.
They are not just VERY STRONG but also BRITTLE!! If they collide hard with each other, or collide hard against any object, they will most likely break. Those neodymium magnets are very difficult to pull apart due to their strength. Neodymium magnets are composed of three elements - neodymium, iron and boron in ratio 2:14:1 and are sometimes known as NIB (or chemically NdFeB) magnets. They are also called rare earth magnets, as neodymium contained in them is one of the rare earth elements (these are often found together in ore deposits and despite their name are relatively abundant in the Earth's crust).
Neodymium magnets are strongest commercially available magnets and can hold about 1000 times of their own weight. They are 10 times more effective than usual magnets. They have many uses in different industries and their commercial use is ever increasing due to their main property - they are much lighter and much stronger than what we have known until recently.
Just to mention some industrial uses for illustration, they are used in computer hard drives, in parachute closing, in electrical and hybrid engines, cordless tools, loudspeakers, security systems switches, medical devices such as MRI. Even NASA used it to collect dust from Mars for investigation on earth. How can you use these magnets?Here are some examples how people have used them. Their main advantage is their low weight and size, can be easily carried around and are very practical. They are relatively cheap and you can have at home several of them in different sizes for different uses. As metal detectors - find studs, nails in the wall, nails under your flooring or nail/needle you dropped? Holding things in place - tool holder, holding down covers for machinery or cars, hold down things which need to be glued or welded?
Use a pair as clip on earrings, jewellery, name tags, clasps? As oil filters - remove iron and metal chips from oils? Clean metal debris from the workshop surface?
Magnetic bulletin board - use on steel sheet hang on the wall? Repair fridge seal - insert few of magnets in the seal for proper closing?
Hold vehicle glove compartment closed? Door closing on wardrobes, cabinets or cupboards? Shirt fastening instead of buttons or studs?
Erasing tapes, hotel cards, credit cards? Magic tricks, toys and fun. A nd many more uses around the household and workplace.Due to their wonderful strong magnetic properties, these magnets can be dangerous. Small magnets, which are commercially available most of the time, are especially dangerous around small children. If they are swallowed, they can block respiratory and digestive tract.
To be aware of the potential hazardous of these otherwise wonderful helpers, is therefore very important. Goods will be dispatched upon clearance. POSTAL ORDERS - postal orders are perfectly acceptable. We will always strive to solve any issues you might have.This item is in the category "Business, Office & Industrial\Fasteners & Hardware\Magnets". The seller is "homewaretakeaway2009" and is located in this country: GB. This item can be shipped to United Kingdom.