[High Quality Material]Our CNC milling cutters are made of high hardness wear-resistant tungsten steel, which is and less breakable than ordinary carbide CNC drill bits. [Efficient Cutting Performance]These precision mirror CNC engraving bits are designed with scientific chip to prevent wood chips from affecting your work. The cutting speed is fast, and the cutting surface is flat and smooth. [Individual Packaging]4pcs per pack, each individually packed. Includes 1 15 detail drill, 1 20 profile drill, 60 and 90 V-groove drills. [Wide Application]These CNC milling cutters are suitable for MDF, PVC, acrylic, solid wood, plywood, organic board, etc. Widely used for cutting/engraving/engraving/grooving/drilling/milling. Colour: silver Material: tungsten steel Package Contents: 4 * Bits Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.