[Features] Premium Material Angle finder is made of high quality ABS, light and easy handle. It come with brass lock nut, sturdy and stable. Practical Design - You can lock the adjustable protractor arm into the desired position with knurled thumb nut to quickly and easily identify angles, and adjust the screw if it feels too tight or loose before using the ruler. Construction Protractor - This protractor has a 0 to 180-degree semi-circle scale in forward and reverses directions to measure all angles on the job. And you can transfer odd angles to your miter saw Wide Range Usage - This plastic protractor measures inside, and outside slope angles and marking angles. Multi-purpose Protractor Plastic protractor is ideal for construction jobs, cabinet-making, fine carpentry or drawing and more. [product information] product name:Angle protractor color:yellow Material:ABS size:15.5*9cm Packing list (you can get after purchasing one item): Angle protractor * 1 Please understand: 1. Due to the long shipping time, the item may be damaged during the shipping process, if the item is damaged, please leave us a message through the official website immediately before posting comments, and I will solve the problem for you. 2. Due to manual measurement, the size may have an error of 1-3cm. 3. Colors may vary from monitor to monitor.