It also saves the bench from being marred.

The angles should be kept exactly square.
[Illustration: Fig.175.Using a Handscrew to hold a Board at an Angle.] The _miter-box_, Fig.

180, is a similar device with the addition of a guide for the saw.

The _iron miter-box_, Fig.

181, with the saw adjustable to various angles, insures accurate work.
Such tools as _pliers_, Fig.