HIGH QUALITY MATERIAL - Diamond with the highest precision with superior strength, sharpness and durability. You can be sure that these cuticle drill nail bits will last a long time. Milling cutters for universal applications offer good machining performance and produce a high quality. Milling cutters from are characterized by good machining performance and a long service life and enable impact-free work thanks to precise concentricity. Materials Applications: Hard Wood, Balsa, Wax, Soapstone, , Marble, , Concrete, Steel, Hardened Steel, Weld-Seam, Stainless Steel, Brass, Copper, Bronze, Aluminum, Cast-Iron, Cast-Steel, Cobalt, Nickel, Titanium, Zinc, Earthenware, Terracotta, Porcelain, Fiberglass, Plastic, Rubber, Fiber-Reinforced Plastics and so on. Burrs Applications: Carving, Engraving, Sculpting, Deburring, Contouring, Chamfering, Milling, Cleaning, Porting, Cutting, Grinding, Polishing,Elongating,Tooling,etc. Manual: 1. Always wear ear, eye, face protection and protective safety gloves. 2. Generally, for rough work, move the burrs across the workpiece counter-rotationally. 3. Pass the tool over the workpiece in the direction of rotation to achieve fine finishes. 4. Min Clamping depth is 2/3 of the shank, if you have to clamp less, pls low speed. 5. If rough running, strong vibrations and increased flying , pls use a new one. 6. Do too much pressure, Let the speed do the work. Smaller burrs require faster speeds. 7. Soft materials, such as aluminum, use a grinding oil to reduce debris clogging. Grind glass, use water as lubricant. 8. Elongate holes, grip tool firmly with two hands and use a swinging motion, which prevents chatter, result in a cut. 9. Avoid impact loads, otherwise parts teeth will break off, shank will bend. Do not sink the burr for more than 1/3 of its Style:Double Pattern Colour:Silver Material:Tungsten Carbide Package Contents: 1 * Tungsten Carbide Milling Cutter Kit Only the above package content, other products are not included. Note: Light reflection 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.