You will receive: the package contains 5 pieces wood carving and engraving drill bits and 10 pieces double cut carbide rotary burr, 15 pieces in total, which can be applied for many occasions and satisfy your various needs Size details: wood carving tools have 5 sizes carving, 3 x 3 mm, 3 x 4 mm, 3 x 5 mm, 3 x 6 mm, 3 x 7 mm, 3 x 8 mm in shank and bit diameter; The total length of the carbide rotary burr set is 45-50 mm, the cutting diameter is about 1/4 inch, the shank length is about 35 mm, the shank diameter is approx. 1/8 inch Durable to use: the wood carving and engraving drill bits are made of high-speed steel, and the double cut carbide rotary burrs are made of tungsten carbide, they are reliable and sturdy, you can use them for a long time, and bring you nice using experience Easy to use: the 1/8 inch handle fits most rotating tools, just install it like any other typical drill bit easily, will be your ideal choice for DIY woodworking, engraving and other projects Functional tools: our practical tool accessories provide you delicate fine processing, widely applied in metal, woodworking, model engineering, woodcarving, jewelry making, casting, polishing and so on