Accurate Measurement: 360 protractor pack of 10 angle finders are precise measuring tools that help users measure angles and arcs. This tool can improve the accuracy and precision of measurements to meet the needs of users Easy to Use: The 360 swing arm plastic protractor is very easy to use and helps users to measure angles and radians quickly and accurately. These swing arm protractors are designed to be very simple to use. Also, this tool is very lightweight and can be used anywhere Sturdy Material: The protractor angle with swing arm is made of premuim plastic that will durability and longevity. This tool can withstand a certain amount of weight and pressure, and is not easy to be damaged and worn out, thus maintaining long-lasting results Portable Design:The clear protractor with arm is made of portable design, can be used anywhere and anytime. This tool can be put in your pocket or toolbox, which is convenient for users to use and carry at any time Widely Applicable:These plastic circular protractor can be widely used in a variety of different industries and fields, such as construction, machinery, manufacturing and so on. This tool can help users measure angles and quickly and accurately, thus improving work efficiency and accuracy, Manufacturer: Niltracy