Sufficient Quantity: you will get 40 pieces diamond burr bits sets, including 6 shapes, the rich quantity and diverse shapes are enough to meet your daily using needs Sturdy Material: the rotary grinding burrs drill bits set is made of diamond particle, sturdy, thick and reliable, with high hardness and impact resistance, can well work for some fine detail work, and can you for a long time 6 Shapes: the diamond carving tools are designed in 6 different shapes, including sphere, cone, cylinder, round head cylinder, pointed, flat plat and more, which not only can meet your different requirements, but also improve work efficiency and save mote time and labor Universal Shank: the diamond grinder bits set features with 1/8 inch shank, which compatible with most rotary tools or die grinders, very nice and practical tools in Widely Applicable: the diamond drill grinding bit can be widely applied for polishing, grinding, drilling, cutting, engraving, carving, etc., it is also capable of engraving on a of materials, such as tiles, ceramics, marble, , and more; A very nice helper for a family Features: Made of quality material, the diamond grinding tools set is sturdy and long lasting to use, perfect for fine detail work, such as polishing, sanding, grinding, cutting, engraving, carving, and more. These diamond burrs contain 6 different shapes, which are enough to meet the different requirements of carving enthusiasts and craftsmen. Specifications: Material: diamond particle Color: as shown Size: about 4.5 mm/ 0.18 inch long Package Contents: 40 x Rotary tool diamond burrs set (6 shapes) Only the above package content, other products are not included. Note: Light 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.