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. .Divider Proportional 10".10" divider with precise rack and pinion movement. Replaceable hardened steel needle points. Matte chrome finish resists wear and corrosion. Includes reference mark for golden section. Velvet lined case.