[ Adjustable ] The diameter size can only be adjusted between 10mm and 77mm. The Circle tool can be used to draw round measurements, etc. It can be adjusted, can be or. Simply rotate the rings to open and close its captivating opening mechanism. [Easy to Use] The diameter becomes more by turning in the hands of a watch, more turning in the reverse of the hands of a watch. It is an easy to carry plotter, precision gauge, and can be used in industry. MAIN FEATURES: [Premium Material] The drawing tool is made of aluminum alloy and high-quality stainless steel, it is durable and not easy to rust, with good hardness, high strength, good corrosion resistance, easy to use. [ VERSATILE ] The round circle template ruler tool is a tool for carpentry students. Can be used as a 360 metric for students and schoolchildren. Also ideal for carpentry, sewing, sewing and hoists., Weight: 0.42769678828 pounds, Manufacturer: Aflytep