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With the active use of the coil, its component parts gradually begin to fail. Often the owners of such devices try to upgrade the coil themselves. Usually, not only the appearance is updated, but also the elements. For maximum strength, it is necessary to use a high-quality fastening bolt of the search coil, because the main load volume is directed to it.
Bolts are used to fasten the coil and lower rod. For the manufacture of fasteners, safe and strong materials are used. Universal bolts, suitable for various types of devices.