This simple device will help with the help of ordinary hand drills to cut holes of any diameter in the plywood, hardboard and particleboard.
Recommend to read
MOTOR FOR CARLSON
Looking at this unusual aredigital, could not help thinking that he was inspired by the famous Swedish writer Astrid Lindgren for creating well-known children's story "Karlson on the...
COMPACT ELECTRO-SOLDERING IRON
I have improved the conventional electric soldering iron. It turned out lightweight and compact (see Fig.), you can carry even in your pocket. It is easy to make and a beginning radio...
