Any is, perhaps, too, but the hole in the tree Ø 20-55 mm this tool to drill. Drill-Perca consists of a Central rod of square section and two blades, pivotally attached to the rod. Sami knives carved from overage mills.
Recommend to read
SENSITIVE METAL DETECTOR
The metal detector I designed operates on the beat frequency principle, which arises from the difference in oscillations between the reference and the tunable oscillators (typically the...
ASSAULT GUN “FERDINAND”
His appearance in the world's most famous German self-propelled gun of the Second world war, Ferdinand was obliged, on the one hand, the intrigues around the heavy tank /K 4501 (P), and...
