Measure twice, cut once, create always The geometer's tool - Master brass ruler for angles, lines & measurements 100% handmade in Turkey This is the perfect antique-inspired accessory for your desk or to carry with your journal. Made of 100% solid brass and etched for durability with both imperial scales. The geometer's tool includes a protractor, imperial and metric measurements. It makes the perfect reference point for all applications. Product details: Length: 6' Ruler 6' and 15 cm Black etched scale Thick brass Protractor* Triangles 30, 45, 60 , 90 degrees Imperial and metric measurements Parallel lines for easy alignment Good for cutting * The protractor is an instrument used for measuring angles. The protractor is usually a semi-circle size divided into 180 parts or a full circle divided into 360 parts.