It is primarily used in projecting horizontal lines and guiding triangles to draw vertical lines. This instrument is easily recognized by its simple parts (the head and the blade).

The head of this instrument is fastened on the blade.

It consists of two heads, one adjustable and one fixed for angled lines.

These T-squares are designed for easy transportation.

It is a three-sided measuring instrument and is usually made up of a plastic material.

This is used to draw arcs and circles. This drawing instrument consists of one pen/pencil leg and a needlepoint leg held together by a handle. This can be used for penciling or inking.

This instrument is used to transfer measurements, plot distances, divide line segments. It has two needlepoint legs and is held together with a handle.

This is an instrument used to measure arcs, angles, and circles. It is a semicircle plastic with 180-degree graduation.

These instruments are used to draw curves with an irregular set of templates.

These are stencils made of flat plastic with standard symbols cut in it for easy guide when drawing symbols for a plan.

This is a measuring tool primarily used forreducing or enlarging a drawing to a specific scale. With this tool, it is possible to create a blueprint that is ten times largeror smaller than the original drawing constructed. It is usuallya 12-inch rule with two faces on each side, one for architects and one for engineers. Each face has values of each ratio.

This a thin metal with holes and used to protect the parts of the drawing when removing pencil marks.