If the head of the screw to give with the help of nalilsya the form shown in the figure, then any attacker will not be able to turn. On such hardware it is recommended to set sensible things sailing and motor boats, hook locks.
Recommend to read
AND THE STUMP WILL COME IN HANDY
The stump on the dacha is usually not only a hindrance but also a problem: to root out its not so easy. However, you can not get rid of it, but rather made to serve. For example, using...
“FORWARD, TO MARS!..”
This slogan was the basis of the life and work of one of the founders of Russian space engineer Friedrich Arturovich Tsander, who developed the 20-ies of the last century one of the...
