TriMan Overhead Compass/Ruler

It is versatile and easy to use, this precision tool allows you to draw circles, straight lines, and complex geometric shapes with accuracy and artistry.

Construct, copy, and read angles; measure and convert inches and centimeters; and much more. To use this device, simply slide the cursor to the desired position and lock; placing a finger on the transparent swivel disk will anchor the ruler as you draw with the pencil point in the cursor hole.

WARNING: CHOKING HAZARD- Small Parts. Not for Children Under 3 Years.