• Graduated slide rule extends up to 6 additional inches
• Stops at each end to prevent slide from falling out
• Marked along both sides and both edges
• Graduated to 1/16ths of an inch

Since 1869, Crescent Lufkin® has stood at the forefront of measuring tools and equipment, with industry-leading quality and innovation. We enable the consumer or professional user with reliable, precise, durable lines of products, including our wooden measuring rules. Since patenting the Lufkin Folding Rule in 1919, we've been manufacturing top-quality tools, like this rule which features brass joints, clear graduation markings on both sides and edges, and two extending slide rules.