If the last joint in a picture-frame does not quite match, a kerf may be sawn at the junction of the two pieces, which can then be drawn close together.
[Illustration: Fig.172.

Picture-Frame-Vise.] _Handscrews_, Fig.

173, consist of four parts, the shoulder jaw and the screw jaw, made of maple, and the end spindle and the middle spindle, made of hickory.

The parts when broken can be bought separately.

Handscrews vary in size from those with jaws four inches long to those with jaws twenty-two inches long.