Specification Brand : All American BulletPoint1 : I.D. Tolerance of +.0001/.0005 BulletPoint2 : Concentricity of 0 to .0003 Total indicator reading maximum BulletPoint3 : Heat treated to Rockwell C62 to 64. BulletPoint4 : No Counterbored BulletPoint5 : IMPROVE RIGIDITY AND LIFE: Possess strong shock resistance, easy to store and maintain, greatly improving the rigidity of the bar, and improve the life of the blade CompatibleFastenerDescription : 0.25 inches DriveSystem : Hex ExternallyAssignedProductIdentifier : 8270311496065 ItemLength : 1.5 inches ItemName : All American Type PM Bushing, 17mm ID x 26mm OD x 16mm L, Drill Bushing C1144 Steel, Heat Treated to Rockwell C62 to 64 Made in USA ItemPackageDimensions_Height : 14.5034 centimeters ItemPackageDimensions_Length : 1.905 centimeters ItemPackageDimensions_Width : 10.0076 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : drill-adapters Manufacturer : All American Bushing MeasurementSystem1 : Imperial MeasurementSystem2 : Metric NumberOfItems : 1 NumberOfPieces : 2 PartNumber : PM26-16-17 ProductDescription : All American Drill Bushing are made in the USA from steel obtained from a domestic steel foundry. Our standard bushings are made of C1144 and heat treated to Rockwell C62-64. Concentricity is held at 0 to .0003 T.I.R maximum for ID sizes of 1/8 to ½ and 0 to .0005 T.I.R Max for any other size. A blended Radius on the drill entrance improves drill entry and alignment which prevents tool wear and breakage. All of our products are free of conflict materials of any kind and conform to Reach. ProductSiteLaunchDate : 2014-11-20T08:00:00.000Z Size : One Size SupplierDeclaredDgHzRegulation : unknown UnspscCode : 20111700