JOINTER

As its name implies, you use a jointer (figure 8- 1) to make various mortar joints. There are several different types of jointer - rounded, flat, or pointed - depending on the shape of the mortar joint you want.

SQUARE

You use the square (figure 8-2, view 1) to measure right angles and to lay out corners. Squares are usually made of metal and come in various sizes.

MASON'S LEVEL

The mason's level (figure 8-2, view 2) is used to establish "plumb" and "level" lines. A plumb line is absolutely vertical. A level line is absolutely hori- zontal. The level may be constructed of seasoned hardwood, various metals, or a combination of both. They are made as lightweight as possible without sacrificing strength to withstand fairly rough treatment. Levels may be equipped with single or double vials. Double-vial levels are preferred since they can be used either horizontally or vertically.

Figure 8-2.-Square, mason's level, and straightedge.