Basic-Bow Combination Compass with Beam Bar

6" pencil compass/divider designed with a fiberglass ringhead and pivot design for smooth, firm adjustment. Accurate center wheel adjusts quickly and easily for circles up to 10". Built-in spindle stop prevents overextension. Extra lead, needle point and T-bolt. Matte nickel finish resists stain and tarnishing. Split leg design that accepts interchangeable pen, pencil and divider parts. Slip handle for spare ruling pen. Equipped with beam bar extension for circles un to 20" in diameter.