When using magnets sometimes it is required to pick up material of certain sizes and with the set properties. It is possible to get the necessary magnet in finished form, of course. But if it is not possible to make it, it is possible to try to make the required magnet independently, having divided a finished product into two or even several parts. At the same time each of new small magnets will keep the natural properties.
The irreplaceable, unique device for each fisherman is a sonic depth finder which allows to measure reservoir depth, to investigate the general condition of water, to define a congestion of fishes, a relief of the available underwater barriers and a bottom. Buying itself this device, fans of fishing get the reliable assistant, and here is how to use the sonic depth finder, in practice not all professional fishermen know what to speak about the beginning amateur fishers.
