Chisels of bronze began of very small size (33) at S.D.
For this purpose a horizontal bar Shaft armed with vertical cutting chisels is used, which cuts boring.
The use of harpoons and small chisels of copper next arose, then broad flaying knives, needles and adzes, lastly the axe when the metal was commoner.
Castings were not trimmed by filing or grinding, but by small chisels and hammering (P.R.T.
But the absence of the long-shaped implements, so characteristic of the Neolithic and Palaeolithic series, and serviceable as picks, hatchets, and chisels, shows remarkable limitation in the mind of these savages, who made a broad, hand-grasped knife their tool of all work to cut, saw, and chop with.