If you want to cut a round hole in the plywood or other rigid sheet material, but no jigsaw or handsaw pointed, easy to assemble witty prisposoblenie that will replace these tools. Only need two metal cores, one of which is pointed, the other sharpened like a cutting torch. Clamped in the vise at the required distance from each other, the first rod will serve as the axis on which will be pressed to rotate the plywood on top, and the second is from the bottom to cut the necessary hole.
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THE BAYONET EVEN SHARPER
However, it can be made more versatile if the blade is cut, as shown in the figure. This more acute wedge-shaped version of the shovel is easy even in the most dense, parched soil.
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In addition to the hourglass, there are more structurally similar water. Their simplified version can be made and most. Enough to take two graduated bottles for baby food and to connect...
