Quick Set Bow Compass

ADJUSTABLE BOW COMPASS This is a high quality compass with automatic adjustment lever and jointed legs. Fast estimated adjustment is made by squeezing a lever found on either side of the leg. Finer adjustment is made by using the strong center spindle wheel. This compass works great for geometry students.  EXTENSION BAR TO MAKE LARGER  CIRCLES The extension bar can be optionally attached to allow for larger circles up to 23.6 inches (600 mm) in diameter. PENCIL ADAPTER The pencil adapter also takes pencils, colored leads or Indian ink refills up to 0.43 inch (11 mm) in diameter in place of the regular lead (that comes with the compass or refill kit) to add an artistic or aesthetic element to your drawing.  EXTRA ACCESSORIES AVAILABLE REPLACEMENT LEADS There is a small box of replacement leads available. It contains 15 graphite tips 2B with a diameter of 0.07 inch (2 mm) and a length of 0.98 inch(25 mm). The plastic storage box is provided with a piece of sandpaper 0.39 x 0.86 inch