Like sandpaper it should not be used till all the work with cutting tools is done.

It can be manipulated until utterly worn out.
5.

POUNDING TOOLS.
The _hammer_ consists of two distinct parts, the head and the handle.
The head is made of steel, so hard that it will not be indented by hitting against nails or the butt of nailsets, punches, etc., which are comparatively soft.

It can easily be injured tho, by being driven against steel harder than itself.

The handle is of hickory and of an oval shape to prevent its twisting in the hand.
[Illustration: Fig.157.Resharpening a Cabinet-Scraper: Flattening the Edge.] Hammers may be classified as follows: (1) hammers for striking blows only; as, the blacksmith's hammer and the stone-mason's hammer, and (2) compound hammers, which consist of two tools combined, the face for striking, and the "peen" which may be a claw, pick, wedge, shovel, chisel, awl or round head for other uses.