1The Simplest Measurement Method: This angle ruler is a measuring and layout tool, which can save your time, money and energy. The angle ruler is the simplest way to measure irregular shapes. 2Easy to Use: The angle plastic protractor adopts a unique tightening design and can be easily operated by one hand. The protractor is suitable for measuring all angles and shapes. 3Accuracy: This is a professional angle protractor, which is very suitable for accurate angle measurement and makes you more accurate when making and measuring objects. 4Adjustable Design: The angle ruler has a 4 sided ruler mechanism, which can slide and lock to any required angle. As a reusable template, the protractor will bring greater convenience to your manual production. 5Wide Applicability: This angle ruler can be applied to many scenes, such as carpentry measurement, angle measurement, DIY gift, etc, which has practical value.