Professional Kit: There are 20 different shapes and sizes of rotary cutters, you can choose different types of cutting heads according to your work needs, to meet your different craft creation needs. MULTIFUNCTIONAL TOOL: The diamond drill has 20 different grinding bits for engraving, etching, chamfering, grooving, reaming, punching and more. It is an excellent tool for detailed work. High-quality Material: The countersink bit is made of high-quality high-speed steel, which has a long service life and has the advantages of high hardness, good wear resistance and heat resistance. Compatibility: Suitable for Dremel electric rotary tools and most mini grinders. User-friendly design and easy insertion process, very easy to use. Versatile Use: The Dremel wood router bit can process soft metals such as plastic, ceilings, drywall, laminate, fiberglass, vinyl, aluminum, etc. It is ideal for DIY enthusiasts, jewelers, designers, and more.