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
ROLLER+ROLLER
The device shown in the illustration will be useful to all house masters, making furniture with his own hands. With its help you can easily and quickly roll while gluing forever lagging...
THE FIRST AND EASIEST SNOWMOBILE
The snowmobile, which, the story goes, collected the tenth-grader Sergey Sorokin from the Altai village of Ust-Kamenka. This is not surprising. Equipment guy is fond of since...
