90*150 Protractor Stainless Steel

It seems you’re referring to a specific type of protractor made of stainless steel with a measurement range of 90 to 150 degrees. This type of protractor would typically have a semicircular or circular shape with a measurement scale ranging from 0 to 180 degrees or from 0 to 360 degrees. However, its special feature is that it focuses on measuring angles specifically between 90 and 150 degrees.