When drilling holes on the Ceiling it is difficult to keep the tool and yourself from rolling on top of small fragments and dust. Help out a peculiar conical helix wound from a spring wire. Wrapped in plastic film or package, it will turn into a soft pliable bag that will collect all the crumbs from under the drill.
Recommend to read
MOTORBOAT “MIRAGE”
In my time, I had the opportunity to build and test many motorboats. The first to hit the water was the motorboat "Zvezdochka", whose drawings were published in the October 1966 issue of...
TURTLE, LATE FOR WAR
1942 the British General staff attended to the question: "How should a heavy "assault tank", able without harm to themselves to act at the head of the offensive orders troops?" At that...
