These dividers combine rigidity, light weight and easy handling. The legs are forged steel, well-shaped, properly tempered and highly polished. The adjustable point may be quickly removed and a common pencil inserted in its place The sturdy construction of the joint, combined with the quadrant, eliminates side defl ection of the legs. A quadrant adjusting nut permits fine-adjustments for close measurements. A check nut located between the legs locks the legs firmly after the proper adjustment has been made.