Specification Brand : Starrett BulletPoint1 : Threads of the spring nut engage with pressure and release when pressure is withdrawn, to save time in opening and closing BulletPoint2 : Bow spring is flexible yet strong to ensure reliable measurements BulletPoint3 : Legs made of square stock for heavy-duty use BulletPoint4 : Hardened fulcrum stud to help prevent give and loss of measurement BulletPoint5 : Curved tips to transfer the measurement of the internal size of an object Color : Factory ExternallyAssignedProductIdentifier1 : 049659503487 ExternallyAssignedProductIdentifier2 : 0049659503487 ExternallyAssignedProductIdentifier3 : 00049659503487 IncludedComponents : Central Tools - Caliper Sprng Id 6In (6527) ItemName : Starrett spring nut Inside Spring Calipers, Square Leg, 0"/0mm-4"/100mm Range ItemPackageDimensions_Height : 2.54 centimeters ItemPackageDimensions_Length : 20.574 centimeters ItemPackageDimensions_Width : 10.414 centimeters ItemPackageQuantity : 1 ItemShape : Square ItemTypeKeyword : joint-calipers-and-dividers Manufacturer : Starrett Material : Alloy Steel ModelNumber : 74B-6 NationalStockNumber : 5210-01-435-7046 NumberOfItems : 1 PackageLevel : unit PartNumber : 74B-6 ProductSiteLaunchDate : 2006-12-13T07:59:59-00:00 Range : 4"/100mm Size : 6 to 7.9 Inches Size1 : 6 to 7.9 Inches Size2 : 4 to 4.9 Inches Style : Inside SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 41111600