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.
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To permit sheet metal, need metal shears and a line with the Scriber for drawing cut lines. And if you can see the curved workpiece? Use the bolt or stud of suitable length, as shown in...
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When drilling in ferrous metals, blind holes, and especially cutting them in thread, at the bottom remain shavings and sawdust, which is not so easy to remove, especially if the part is...
