Cast in many industrial products have long been used mortgages (anchor) bolts with special heads, such that not only pull, but rotate can’t.
With the advent of high strength composite self-hardening compositions that bolt you can “lay” in the body of the finished product (plastic or metal) and making it pre-nest, and then simonaityte.
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They can be made in just a few minutes. For this you need to saw off part of an old metal barrel and attach it with bolts to handles (e.g., spade handles). Yu MACHALA, 13 pet., Lviv, Ukraine
