This durable, 6" flat compass can draw circles from 1\/4" to 10" in diameter. Unique design eliminates the sharp point found on traditional compasses. It can be used with assorted writing instruments. Use the internal circle templates on one end. Two built-in, mini rulers offer measurements in 1\/16" along one edge and millimeters on the other. You can also insert your writing utensil in one of the pre-punched holes along the ruler to make a certain size circle. Compass is made with shatter-resistant SAFE-T plastic.