Features: Made of aluminum alloy and stainless steel materials, with the characteristics of not easy to rust and damage and has a long service time. 360 rotating bearing makes your circle drawing process more smooth and accurate, and improves your work efficiency. The portable design and small size allow you to easily carry it by put it into your tool bag or even your pants pocket. It has a wide ranges of applications, suitable for carpentry work, industrial design drawing and so on. Using it, you can draw circles of different sizes to meet your diverse drawing needs.