Specification Brand : GS Tooling BulletPoint1 : 【TAPER ACCURACY】 – Industry leading at AT2 or better with superior grinding of all mating surfaces BulletPoint2 : 【RUNOUT ACCURACY】 – Total indicator runout (TIR) of 0.0001" (3um) BulletPoint3 : Used for layout, set-up, checking heights, depths and setting angles BulletPoint4 : 【COOLANT FEATURES】 – AD/B coolant capabilities come standard on every holder. That means unlike most other holders on the market, GS Tooling accommodates machines with through spindle (AD) or DIN (B) flange entry, enabling machinists with multiple types of coolant delivery to use the same holder for either machine. BulletPoint5 : 【ADDED FEATURES 】– Each holder comes with a balance certificate, RFID capability, tighter H4 thread class for reduced friction and greater torque CutType : Taper ExternallyAssignedProductIdentifier1 : 0752273516664 ExternallyAssignedProductIdentifier2 : 752273516664 ItemName : GS Tooling 531170 CAT50 1-1/2" x 4.50" End Mill Holder ItemPackageDimensions_Height : 10 inches ItemPackageDimensions_Length : 4.49 inches ItemPackageDimensions_Width : 4.49 inches ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : end-mill-holders Manufacturer : GS Tooling NumberOfFlutes : 4 NumberOfItems : 1 PartNumber : 531170 Pattern : 1-1/2" x 2.99 ProductDescription : Shank Type: Taper Shank Taper Size: CAT50 Hole Diameter (Inch): 1-1/2" Nose Diameter (Decimal Inch): 2.99 Projection (Decimal Inch): 4.5 Through Coolant: Yes DIN Coolant option - standard All Ground Body Premium balanced to 25,000 rpm Comes with certificate ProductSiteLaunchDate : 2023-03-15T19:40:45.565Z Size : 1-1/2" x 2.99 Style : End Mill Holder CAT50 ToleranceHeld : Standard UnitCount : 1