DescriptionThese diamond grinding heads are made of carefully selected materials, which are sturdy and will not be easily damaged. Great for carving and cutting on many kinds of materials, suitable for home improvement and craft. A nice helper for you to polish, grind, drill, cut, engrave and more. Features- Color: As shown.- Material: Emery.- Size: About 1.50X1.50X4.40cm/0.59X0.59X1.73inch.- Made of high grade materials, wear resistant and firm, and long service life.- Professional and practical design with beautiful appearance, easy to carry and use. - Allowing them to be compatible with most rotary tools as you finish, grind, and shape your work with precision. - Able to engrave on a wide range of materials including: wood, acrylic, PVC, plastics, etc. - Style different bit can reach more carving, great for all types of detail work.20 x grinding bits