Prepare yourselves,
a) this is obviously a Russian investigation into ancient high-technology stone-cutting tools that someone has over-dubbed in English at their own leisure, so give it some slack because it contains excellent world-wide examples of stone cut in ways that are not-achievable today.
b) like a magical chrome wand, the hand-held ancient stone tool seems to have been drawn dowon vertically through a wall of SOLID ROSE GRANITE at Karnak Temple like it was warm butter to a thickness of less than a tenth of a millimeter at its tip...
