Specification Brand : Tyenaza BulletPoint1 : Good Tools: This gear milling cutter is a special cutting tool specially designed for milling gears with 8 tools can be provided to suit different numbers of teeth. BulletPoint2 : Exquisite Design: Great workmanship, with straight tooth design suitable for involute gear form, perfect replacement for the old or damaged one. BulletPoint3 : Easy to Use: The size and proportion are uniform to provide a good cutting range and sufficient rigidity. BulletPoint4 : Material: Using high speed steel materials, strong and durable, has a long service life. BulletPoint5 : Specification: The outer diameter is 55mm / 2.2in, the inner diameter is 22mm / 0.9in and the pressure angle is 14.5°. CompatibleMaterial : Metal ItemName : Tyenaza 8Pcs Involute Gear Cutter, 14.5° 55mm x 22mm HSS Milling Cutter Set Pressure Angle Cutting Tool Industrial Supplies for Milling Machine ItemPackageQuantity : 1 ItemTypeKeyword : involute-gear-cutters Manufacturer : Tyenaza Material : High Speed Steel NumberOfTeeth : 12 PartNumber : Tyenazaukrs8xzf93 ProductDescription : Specification: 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°