Big Horn 19077. This wing divider transfer precise distances for highly accurate layouts. Bisect angles for precise angle measurements. Ideal for measuring diameters along or accurately reproducing arcs and circles! This divider tool features a lockable wing to easily repeat measurements. Steel legs with fine, hardened points for perfect layouts. Knurled knob locks dividers from 0 to 90 degrees. The 6" size is perfect for general bench and lathe work. Designed for reliable, accurate layout and measuring. Get precise diameters for a variety of projects with this handy wing divider!