Rolling Ruler Parallel Line Arc Curve Drawing Msuring Roller Ruler with Built In Protractor

[Parallel Line Drawing] The rolling ruler ftures a roller for sy parallel line drawing, ensuring stability and preventing slippage while you crte parallel lines. [Versatile U] With a round hole for every centimeter, the drawing ruler allows you to draw circles and ovals, versatile and practical. [Clr Msurements] The msuring rolling ruler is designed with clr scales and various formulas printed on the roller for quick calculations, ensuring accuracy and efficiency. Item Type: Rolling Ruler Material: Plastic Use: Built in protractor for msuring angles; Msurement values on the roller for drawing parallel lines at a fixed distance while sliding on the page; Pencil hole for drawing arcs and circles