Product Description Material: Ceramic Package Contents: 1 grinding kit (7 pcs) 1.【Premium Ceramic Material】: Made of superior ceramic material, these nail art tools are durable, sharp, and long-lasting, and also made with delicate precision. With excellent heat dissipation, the bits will not get burning hot during long-time use like metal bits. 2.【Perfect Drills】: A total of 7 different nail drill bits, which fit most nail drilling machines that use bits, durable for long-term use. They can be used to polish the nail surface or even get into tight areas such as sidewalls and cuticles. The drill brush helps to clean and shine the nail surface and drill bits. 3.【Multifunctions】: Adopt the highest precision standards ceramic with superior strength, sharpness, and durability. Professional shapes and sizes design meet the diversified needs, such as nail beautifying, nail cleaning, and care. Perfect for refining and shaping nail edges and removing dead skin easily. 4.【7 Pcs Nail Drill Bits】: Set with a corn top (coarse grain), large cylinder top (medium grain), ball cylinder top (fine grain), umbrella top (fine grain), needle bit (medium grain), micro ball bit (medium grain), brush drill bit. Suitable for most sizes of shank nail drilling machines. 5.【Easy to Clean】: Nail drills are corrosion-resistant, as well as no clogging for nails. Nail brush can easily clean the dust on the bits or nails, protect the bits after each use, keep you and your client's nails healthy.