A crosscut-saw may be thought of as a series of knife points, arranged in two parallel rows.
The teeth of a crosscut-saw are like knife points, they score two lines, and the wood breaks off between them.
As a matter of fact, the crosscut-saw cuts somewhat on the back stroke.
In filing a crosscut-saw, the file is held pointing upward and toward the point of the saw.
The back-saw, tho a crosscut-saw, may be used in any direction of the grain.