Alvin - Basic Bow Compass with Divider - The Alvin Basic Bow Compass and Divider is a 6 inch pencil compass and 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 inches. The Alvin Basic Bow Compass and Divider has a built-in spindle stop that prevents overextension. Supplied with extra lead, needle point, and T-bolt. This Compass and Divider has a matte nickel finish resists stains and tarnishing. 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.