Description:The milling cutter has PTEF coating. It has the design of solid hard alloy valve and rebound.With the high hook shear angles, the milling cutters slice smoothly into stock producing cleanly without fragment.Premium hard alloy material makes this router bit hard and durable.There are fives types for you to choose from, and these five types differ in size.It is used for engraving the door.Item Name: Milling CutterMaterial: Hard AlloySpecification: Type 1, Type 2, Type 3, Type 4, Type 5Size Details: Type 1 Size: 2.9cm x 4.2cm/1.14" x 1.65" (Approx.) Type 2 Size: 2.9cm x 4.13cm/1.14" x 1.63" (Approx.) Type 3 Size: 2.9cm x 4.4cm/1.14" x 1.73" (Approx.) Type 4 Size: 2.9cm x 4.2cm/1.14" x 1.65" (Approx.) Type 5 Size: 2.9cm x 4cm/1.14" x 1.57" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Milling Cutter