When you do not have a suitable spanner to Unscrew the hex-head bolt will help out any screw with two nuts — preferably square-shaped.
Recommend to read
THE SECOND PROFESSION OF AN ELECTROCARDIOGRAPH
In the process of creating Amateur designs may require tools and equipment that are available it is often difficult. In such cases, comes to the aid of ingenuity, and craftsmen are...
QUICKLY AND ACCURATELY
Troublesome activity, building profiles of the wing flying model aircraft. We have to count tens and hundreds of the coordinates of the ribs in accordance with the selected size of the...