Hand saw

They operate by having a series of sharp points, called teeth, of a substance that is harder than the wood being cut.

Crosscut saws have sawteeth that are shaped, often with a metal file, in such a way that they form a series of tiny knife-like edges.

Rip saws, on the other hand, have chisel-like sawteeth and are meant to cut parallel, or with, the grain.

The first was the importance of wood to a society, the development of steel and other saw-making technologies, and the type of power available.

[1] Among Basques and Australians, traditional hand sawing has generated rural sports.