Flint and chert were employed for knives, etc., but with none of the marvellous skill and artistry of the predynastic Egyptian flint-knapper; the early Babylonian used comparatively simple flakes and the wonderful serration of the Egyptian knives was unknown to him though he made the saw-blades.
The veining of a cherry petal, for example, the tessellation of a carps scales, the serration of a leafs edgeall these lines remain intact, spared by the cutters tool, while the leaf itself, or the petal, or the scales of the fish, have the threads forming them cut so as to show the velvet nap and to appear in soft, low relief.
Look for added improvements like small serrations on the scissors blade to help grip finer materials.
The stem of the clamp has serrations for quick height adjustment within the collar and the screw is used to apply the final pressure.
Serrations along the edge.
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