Stainless steel flexible ruler is made of the finest quality stainless steel with non-skid cork backing that won't slip on glass or polished surfaces. These ruled straightedges are flexible enough to permit measuring and marking on curved surfaces. Raised edges eliminate ink blots and smearing. Permanent acid-etched graduations won't wear off. Graduated in both inches and metrics. Stainless steel non-skid flexible rulers are great for school, shop, office, studio.