This combination is consistent with the essence of modernization, which want to offer such a famous fixture as a screw. It is clear to everyone that it holds better than a nail, but it requires more effort and time for screwing. If it is to drive with a hammer, the material is crushed, it does not form a threaded groove. My screw (1) with longitudinal grooves on the threaded part, produced by forcing through a die (2). It is possible to drive a nail. You only need a little then turn the bolt with a screwdriver: the remaining part of the coils will cut into the material and will hold securely.
C. CUTTINGS, Leningrad
Recommend to read
POTATO FORKS…
Potatoes are often called the second bread. And if the bread on the farm or suburban areas do not sow nor reap, the potatoes are planted by almost all. Clean the roots, digging...
CLIP RENT
All good clutch pencil, some of them even have a built-in sharpener. But from his wooden prototype for some reason he inherited such an inconvenience as the lack of clip. So it costs...
