40 KG\\\\\\\\\\\\\\\' ness
Electromagnetic Locks, In case of DC power to take shape with the strength of the metal become a magnet locks are developed on the basis of logic.
40 KG, 80LBS, holding the door for products, but conservative forces have a "door holder" in use as is appropriate. Strength will be less than that for the implementation of the door is not true.
These products drawers, closets, cabinets, locking the door for such objects are extremely economical and practical products.
In case of power failure electromagnetic locks, magnets lose their property and money for the metal are released.