Alumicolor 12" Beam Compass Rule solves the problem of making perfect large circles up to 36" in diameter. This beam compass attaches to thin profile yardsticks and automatically shows figures for the radius, circumference, and area of any circle in inches or centimeters.

With over 54 years of experience, Alvin is one of the primary sources for drafting supplies and drawing equipment in the country. Together with this core group of products, we continue to meet the needs our customers with our expanding range of fine art, hobby and craft supplies, our large selection of drawing room furniture, and our wide assortment of exclusively-designed products. Solves the problem of making perfect large circles up to 36", in diameter. This beam compass attaches to thin profile yardsticks and automatically shows figures for the radius, circumference, and area of any circle in inches or centimeters.- SKU: ALV7481