In radio and electrical appliances are often the wire is passed in a hole made in the sheet metal. Sharp edges can break the insulation and cause a short circuit. Therefore, usually in the hole is installed a protective plastic or rubber grommet. Replace it with a home practice can tube of medical bottle: it is easy to make a hole with a hot metal rod and the edges to them — zavaliat.
Recommend to read
NOT A PILL, AND LIGHT
Now, many medicinal tablets are Packed in colorful plastic cells, covered with foil or paper. In improvised signal light devices are very convenient to use such cells as the cap-filter...
SAFE STEPS
Not to accidentally fall from the steep stairs leading to the attic or the attic of a country house, or from the ladder, changing a light bulb, I suggest to make steps non-slip. They...
