Specification Brand : Gearwell BulletPoint : Dp18(PA14-1/2 Bore22 No. 1-8 Involute Gear Cutters) + (Tail Thread M12) 22mm R8 Shank Milling Arbor BulletPoint1 : Special cutting tools designed specifically for milling gears, with 8 tools can be provided to suit different numbers of teeth. BulletPoint2 : The size and proportion are uniform to provide a good cutting range and sufficient rigidity. BulletPoint3 : Great workmanship, with straight tooth design suitable for involute gear form. BulletPoint4 : Using high speed steel materials, strong and D urable, has a long service life. BulletPoint5 : The outer diameter is 55mm, the inner diameter is 22mm and the pressure angle is 14.5°. Color : default IncludedComponents : Dp18(PA14-1/2 Bore22 No. 1-8)+R8-22-M12 ItemName : 8Pcs Involute Gear Milling Cutter Set High Speed Steel Cutting Tools 14.5° 55mm 22mm Gear Cutters for Milling Machine High Speed Steel Cutting Tools 8pcs ItemPackageDimensions_Height : 6 centimeters ItemPackageDimensions_Length : 7 centimeters ItemPackageDimensions_Width : 7 centimeters ItemTypeKeyword : involute-gear-cutters Manufacturer : Gearwell ModelName : Gearwellin42mgpahf ModelNumber : Gearwellin42mgpahf NumberOfItems : 1 PartNumber : Gearwellin42mgpahf ProductDescription : Item Type: Involute Gear Milling Cutter Material: High speed steel Outer Diameter: Approx. 55mm / 2.2in Inner Hole: Approx. 22mm / 0.9in Pressure Angle: 14.5°