Search for specific tasks , there are different types of search Magnets:
one-way search magnet designed for steep ( vertical ) search , has one hole for the eye bolt in the butt
two-sided magnets are the most suitable search engines for searching and casts from the shore, has an additional hole for the eye bolt on the side ( in this case, it does not matter – what side of the magnet falls to the bottom )
Searching for sweeping magnet is designed to survey large areas, with two or four holes for the eyebolt , the maximum contact area and holding force .

SEARCHING MAGNETS
Recent technological advances have added to the arsenal fans hobby metal detector original search tool to search for retrieval magnets  Of various types. There are several types of search magnets. This is a very powerful permanent magnets and they are considered as equipment for the detection of ferromagnetic objects.the magnets searching for truth.
Where can I apply search magnet? Is it enough to effectively search for this outfit ? Can a search engine magnet replace what – or hobby metal detector to search for ?

search and recovery by holding force magnetic objects containing ferrimagnetic metals (steel , cast iron, nickel, cobalt) from the bottom of water bodies
search and recovery of magnetic objects in places where it is impossible to use a metal detector (for example , narrow and too deep wells and mines )
uncomfortable or dangerous for human space ( marshy ponds and reservoirs with poor visibility , deep bodies of water , mountain crevices and caves)
trawling waters in search of large iron objects (parts of vehicles and ships) or clean the bottom of the trash definition of magnetism stones (search iron meteorites among the rocks and minerals)
The device is quite simple search of the magnet . The main parts of the body and are inlaid permanent magnet , and more detail is the eyebolt .

This ia two sided permanent Treasure Salvage Magnet.
Lost any KEYS or a Weapon down a drain or overboard on a boat ! great for finding them. Treasure Hunting etc. All you will need is a STRONG rope.
Features:
Treasure Salvage strong magnet  was made of  NdFeB with Tings, appearance does not rust, usually placed in  room temperature, the maximum  operating temperature is 80 ° C , and it never will demagnetization.

Pull Power: more than 120Kg each side
Surface: Nickel plating
Material: NdFeB (Nd-Fe-B), Epoxy compound, ST32 stainless steel
Color: Silver
Magnets Dimensions: 67 mm * 24mm (Diameter * Thickness )
Weight - 0.6 kg

Package included:
1X Treasure Salvage two sided strong permanent magnet (120kg Pull power on each side )
2X Heavy duty bolt/ Rings