Alvin - Bow Compass/Divider - 5 inch - The Alvin Bow Compass and Divider is an all metal 5 inch compass that features extra pivot point for use as a divider. Creates circles up to 8 inches in diameter. This Alvin Bow Compass and Divider includes replacement needle and lead. Alvin is one of the primary sources for drafting supplies and drawing equipment in the country. Creative Coldsnow is a pround retailer of Alvin graphic arts, drafting and fine arts products.