Adjustable Ruler with Radius Arc Measurement - Acu-Arc (Inches)

An essential drawing tool for any serious drafting student and professional architect or engineer, the Acu-Arc adjustable ruler is the one instrument that does it all. No more expensive beam compasses or pre-packaged curve sets that limit you to the given sizes. With this ingenious easily-adjustable design, the possibilities are nearly limitless. Select your choice of measurement in inches or centimeters for this amazing and affordable instrument. A ruler that eliminates the need for a beam compass or expensive curve sets. Can be adjusted to any radius, from 7.88 in. to 200 in. (17 cm. to 500 cm.). Can be used to determine the radius of an existing curve for dimension drawings. Find center lines & center points or determine what a curve must be to fair in existing points or lines on a drawing. Marked in inches or Centimeters.