The pivoting arm of this protractor moves smoothly and extends fully, allowing it to double as a 20cm ruler. Our protractor can be used by anyone, including students, teachers, engineers, designers, artists, and more. The Shinwa protractor mini is capable of measuring acute angles such as blade edges, so don't give up on measuring difficult shapes. Additionally, this durable angle gauge features a hard-chrome, half-round head with right- and left-reading scales up to 180°
Shinwa Rules Co., Ltd. Parent company is a leading manufacturer of measuring tools and woodworking tools like stainless steel rules, squares, chalk lines and so on. Especially stainless steel rules and squares hold 80% market share in Japan. "Penguin mark" is a symbol of reliable Shinwa products. When you buy rulers, please check the symbol mark.