This Gliding Ruler combines a ruler, compass, protractor, and T-square into one lightweight tool you can slip into your bag and take anywhere; to work, or the classroom. Ideal for lettering, it enables you to draw lines at precise distances and angles, and draw curves of any radius necessary to balance your type with visual flair. The ruler is graduated in 1/16" increments, and has a calibrated roller with measurements printed on it so you can draw your lines at precise distances from each other whilst gliding the ruler effortlessly across the page! The protractor measures angles, and guide holes let you draw perfect arcs and circles with precisely measured diameters. Makes cross-hatching and virtually every other drawing technique more fun, including perspective drawing and complex geometric shapes and patterns! Constructed from durable impact-resistant plastic for maximum strength, this rolling compass ruler will give you years of improved productivity!