12 Precision Compass Pencil Holder / Spring Divider / Scriber New. Measures diameters, repeats measurements, and draw circles/arcs without repeat use of a ruler. Sliding speed nut enables quick, smooth adjustments until contact with the center collar. The divider needle point metal tips makes strong engravings and will not slip. This divider works both as a scribe and compass for all your marking needs OTHER SIZES AVAILABLE IN STORE