Safe-T Inch and Metric Calibrated Rule Compass (Includes Instructions) $1.55 B003ELNR5W
Safe-T Bullseye 3-in-1 Compass, Ruler and Protractor, 6 Inches, Pack of 10 $14.65 B0042SWUE0
Safe-T 46110 mmArc Protractor Compass Plus, 15.8 cm Long, Made of Clear Plastic with Bluish Hue, Semicircular Side with Rotating Disc Inset on One Edge, Allows Direct View of Vertex Points $14.99 B00GBG7GKE