• The maths compass is easy grip top control and easy to change the radius of the circle and always lock in position to get their desired circles. You can make perfect circles with the precision compasses for maths.
• Durable material: The compass is made of stainless steel, which is anti-corrosion; the protractor is made of safe plastic, the transparent design is easy to measure and read.
• The compass is about 11.5cm (4.53 inches) long. Protractor measures 0 to 180 degrees left to right and right to left. The best circle drawing tool.
• The drafting compass professional maths kit is the best circle drawing tool for student, artist, mathematician, carpenter. Excellent for use in school, woodworking, or at home.
• Package included: 1pcs silver metal compass, 2pcs lead refills (diameter: 2mm), 1pcs eraser ,1pcs protractor and 1pcs transparent case.