KBNIAN 12 Inch Measuring Rolling Ruler Multi Purpose Scale Draw Drawing Parallel Universal Foot Angle Rulers for Vertical Line Geometry Designer Architect

【Multi--purpose rolling ruler】 Draw horizontal and vertical parallel lines with ease. Draw circles up to 28 cm in diameter. Draw angles with built-in protractor. Draw curves, arcs and other geometric figures. 【Parallel gliders rolling drafting ruler】 Built-in roller, smooth sliding, stable drawing and not easy to skew. There are parallel scales, various formulas and conversion factors on the drum for easy viewing at any time. 【Transparent scale ruler】 The printed black scale of the ruler is clear and easy to observe. Marked in both metric and inch. The transparent ruler allows you to draw without ignoring some important graphics or text. 【Material and precautions】 Made of high-impact plastic, light weight, easy to carry, practical and durable. Note: This rolling ruler is only suitable for use on surfaces with relatively large friction such as drawing paper and canvas, and not suitable for use on surfaces that are too smooth. 【Widely used】 Whether you are an artist, student, designer or architect, this parallel glider drafting ruler is a good helper for your work or study. It can help students develop their surveying and mapping skills and spatial imagination to meet different needs., Manufacturer: KBNIAN