Unless you are a World Freehand Circle Drawing champion, drawing a perfect circle is damn near impossible. Fortunately, we've procured this attractive Alvin Silverline compass. It features solid brass construction and a shiny matte chrome finish, perfect for making your drafting mates jealous. A sturdy push-button mechanism engages the scissor-action threading system for quick adjustments that can be fine-tuned with the precision center wheel. Double knee-joint for parallel leg positioning and precise execution of circles up to 14" diameter. Adjustable, replaceable lead and needle points. Housed in a break-resistant, velvetlined case with see-through lid and spare lead.