Convenient to Use: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. Accruate Corner Angle Rulers:This is a professional angle protractor, which is very suitable for accurate angle measurement and makes you more accurate when making and measuring objects. How 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. Easy to Use: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. Multiple applications: perfect for brick, tile, wood, stone, laminate and any other material! Durable, compact and lightweight: an excellent portable tool that can be easily folded and carried to your next project, Manufacturer: Oumefar