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
CANDLE holder
MATERIAL: heavy-gauge wire or metal rod with a diameter of 6 mm, copper thin wire, copper or brass sheet thickness of 3 mm. TOOLS: tin snips, hacksaw, file, drill and a drill bit Ø...
FIRE AGAINST FIRE…
This device, which is a container with a rod designed to fight fires in grass-roots fires. His task — to set fire to the forest vegetation. The fact that near a large fire, the air is...
