ETA hand2mind Safe-T Bullseye Compass, Bulk Set for Classroom Math (Set of 30) Draw circles, angles, and measure length with this safer math compass The bullseye compass is designed so that circles can be drawn from 1 to 9 360 protractor is freely rotating and provides accurate measurements and makes drawing circles, angles, arcs, sectors, and even pie charts easy Fits both pens and pencils, features both fixed and adjustable radii, and provides direct comparison of inches and centimeters Includes 30 compasses