Specification Brand : Starrett BulletPoint1 : Measure with Precision - Designed for high-accuracy measurement of diameters, suitable for precision applications. BulletPoint2 : Lightweight - Effortlessly handle and transport this ring gage, thanks to its compact size and lightweight construction, making it easy to store and ideal for on-the-go precision measurements. BulletPoint3 : Seamless - Specifically engineered for flawless integration with the Starrett 690-4 system, ensuring optimal performance and accuracy in all measurement tasks. BulletPoint4 : Durable Construction - Made from top-tier materials to ensure long-lasting performance and reliability. BulletPoint5 : The Standard for Excellence - Proudly made in the USA, Starrett combines over 140 years of American heritage and innovation with globally sourced materials to deliver exceptional quality tools and products. CompatibleFastenerDescription : 0.75 inches DriveSystem : Square ExternallyAssignedProductIdentifier1 : 049659638820 ExternallyAssignedProductIdentifier2 : 0049659638820 ExternallyAssignedProductIdentifier3 : 00049659638820 FinishType : Oil Resistant GpsrSafetyAttestation : 1 IncludedComponents : Industrial Tools & Instruments;Dimensional Measuring;hole-gauges; ItemName : Starrett Master .280-Inch Diameter Ring Gage for 690-4 - Precision Measurement Tool - PT23710-4 ItemPackageDimensions_Height : 0.3 inches ItemPackageDimensions_Length : 2 inches ItemPackageDimensions_Width : 2 inches ItemPackageQuantity : 1 ItemTypeKeyword : ring-gauges Manufacturer : L.S. Starrett Company Material : oil MeasurementSystem : Inch ModelNumber : PT23710-4 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : PT23710-4 ProductSiteLaunchDate : 2013-03-29T15:58:29.771Z Size : One Size Style : Modern SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 41111600