Fig. 2. Methods of using the Rule: A, incorrect; B, correct
2. The Try-Square. The try-square has two distinct uses: first, to act as a guide for the pencil or knife point in laying out lines across the grain at right angles to the edge, as shown in [Fig. 4]; second, for testing or trying the adjoining sides to see if they are square with each other.
Fig. 3. The Try-Square
The try-square may be made entirely of iron or steel, but sometimes the beam A is of wood with a brass strip C to protect it and to take the wear. The blade B is of steel and is divided, like a rule, into inches and fractions of an inch. Try-squares are made in several sizes, the most convenient for general use being six inches.
Fig. 4. Methods of using the Try-Square
In using the try-square the beam should be held firmly against the face or edge of the stock. When working near the end of the piece, if the beam projects, reverse its position. For nice, accurate work the knife point instead of the pencil should be used for lining.