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
SB
In 1933 A. N. Tupolev proposed to make the Soviet analogue of "Martin". He undertook this task, but decided it differently. His ANT-40 in no way resembled an American bomber. For maximum...
THE TECHNIQUE OF “MAGIC” MOVIE
For twelve years Hobbies quinoloneresistant I developed and produced a number of useful gadgets to the cameras: for filming with the influx, defocusing, with multiplier prisms, feedback...
