The Nexx Springbow Precision Compass features a heavy-duty, nickel-plated solid steel technical drawing instrument. An integrated central thumbwheel micro-adjustment spindle controls leg widths with absolute accuracy. The sturdy spring-bow tension mechanism eliminates leg flexing under heavy manual downward force. Double-knee joints break outwards smoothly to keep drafting needles vertical for perfect small circles. It serves as a vital tool for Engineering Graphics and Design (EGD) curriculum layouts. This premium scholastic geometry set includes a protective travel hard case and spare replacement leads.