Ball bearing control creates accurate circles up to 12" in diameter. Features positive pencil lock. Includes a pencil and features inch and centimeter guide and a shortened safety point. Each pack includes 12 compasses. Sold as 2 packs for a total of 24 compasses. Ball bearing control creates accurate circles up to 12" in diameter Positive pencil lock Features an inch and centimeter guide, and includes a pencil Shortened safety point Pack of 24