Splendid Quality - Using excellent PP material, the quality of the math compass is incredible. The geometry compass is very durable. And it is lightweight, making it easy to carry around. Practical Non-slip Design - This drawing compass adopts a non-slip design on its handle part. This design is very practical, making the math compass very easy and convenient to use. Wide Range of Usage - This geometry compass has a wide range of usage. It can be used for most levels such as geometry class, drafting, architectural design, or engineering. Easy to Carry - This drafting compass is very easy to carry. It is equipped with a hard transparent storage box for easy carry. Very useful storage box. Replacement Lead Equipped - This art compass adopts a mechanical pencil. It is very easy to use. And a small box of 0.7 mm extra lead refill is equipped. Specifications: Name: Compass for Geometry Material: metal + pp + lead Size: Box: about 13.5*3.5 cm / 5.31 * 1.38 inch Compass: about 12*2.5 cm / 4.72 * 0.98 inch Refill lead case: about 4*1 cm / 1.57 * 0.39 inch Color: White Package includes: 1set*Compass for Geometry Notice: Due to different lighting and screen settings, item colors may vary slightly from the pictures. Due to the difference in manual measurement, please allow 1-2cm difference in size.