Specification Brand : Taytools BulletPoint1 : Features quick-spring nut for rapid and precise fine adjustment BulletPoint2 : Features brass fulcrum and adjustment mechanism BulletPoint3 : Made from high-grade carbon steel with hardened, rounded and finely polished points BulletPoint4 : Flat leg construction makes unit very durable; has substantially hardened spring BulletPoint5 : Maximum opening is 6.5” IncludedComponents : calipers ItemName : Toolmaker's “Yankee” Quick-Spring Nut, Rapid Adjust, Spring Outside Calipers OD Dividers, 0-6.5” / 215 mm Range, Brass Fulcrum and Fine Adjustment Mechanism, Flat Leg, C9-06 ItemPackageDimensions_Height : 0.75 inches ItemPackageDimensions_Length : 11.25 inches ItemPackageDimensions_Width : 5.4 inches ItemPackageQuantity : 1 ItemTypeKeyword : joint-calipers-and-dividers Manufacturer : Taylor Toolworks Material : Steel and Wood ModelNumber : C9-8 NumberOfItems : 1 PartNumber : C9-06 ProductDescription : Outside spring calipers are used for measuring and transferring precise outside (OD) measurements. These calipers are made from high-grade carbon steel with hardened, rounded and finely polished points. They feature a quick-spring nut for rapid and precise fine adjustments that will hold any measurement. Adjustment mechanism is central located to assure smooth action. Fulcrum and adjustment mechanism are brass. “Yankee” style flat-leg construction makes unit very durable. They have a substantially hardened spring for years of service. Maximum opening is 6.5 inches ProductSiteLaunchDate : 2012-10-31T07:00:00.000Z Range : 12.5 inches Size : 4 to 4.9 Inches SupplierDeclaredDgHzRegulation : not_applicable