Circle Perfect Math Compass, Bulk Set for Classroom Geometry, Draw Circles Up to 10-Inches  (Pack of 30) Students can draw perfect circles every time with this math compass set Draw circles, angles, and measure length with this circle math compass Scaled in both metric and inches, allowing circles up to 10 inches or 24 cm Compasses can also connect in tandem to make large circles, or insert an art knife to cut circles Includes 30 compasses