The Mr. Pen 3-pack is a focused geometry solution that includes two set squares and a protractor. These tools prioritize legibility and accuracy, featuring high-contrast laser-etched markings that remain visible on various paper tones. The tools are designed with tapered edges, which helps reduce parallax and allows for closer contact between the pencil lead and the paper for more precise lines.
The set is manufactured from a polystyrene derivative chosen for its refractive index, resulting in excellent transparency. With an average wall thickness of 1.8mm, these triangles provide the stiffness needed for reliable drafting while remaining lightweight for transport. The protractor includes a "no-glare" finish, which is a helpful feature when working under bright fluorescent classroom or office lights. These tools are built to handle daily use and are best stored in a soft-shell organizer to protect the sharp vertices.
If you need to draw circles in addition to straight lines, the Mr. Pen Compass and Protractor set is a more complete option.
Maximize your workspace efficiency with more specialized tools from our ruler and protractor geometry sets.
