1. Measure the distance that you want the Spring Divider to be set [ACCURATE]: Woodworking compass makes circles between 1-1/2" to 17" diameter for measuring diameters, repeats measurements, and draw circles/arcs without repeat use of a ruler. [QUICKLY ADJUSTS]: The Woodworking compass sliding speed nut enables quick, smooth adjustments until contact with the center collar. The needle point metal tips make strong engravings and will not slip. [2 IN 1 COMBO]: This compass divider works both as a scribe and compass for all your marking needs. It is the ideal compass for woodworking. [VERSATILE]: This woodworking compass is perfect for doing large carpentry work, drafting, geometry, woodworking, metalworking, and leather working. [BUNDLE]: Woodworking compass includes Two Pencils with Eraser Tops and One Metal Pencil Sharpener.