Template for drawing circles and arcs

摘要

The template has one or more circular openings, and at least one of which contains a turnable guide disc. This has guide holes to guide a pen when drawing, which are at different distances to the disc centre. The disc also has a second central opening, with a second turnable guide disc with similar guide holes. The guide discs are inserted into and extracted from the openings from the side. The guide holes are positioned along a line extending through the opening centre. The centre of each guide disc has a cross-shaped slot for fixing on the drawing surface.