High Hardness Rotary Burr Set, Shank Steel Drill Bits Grinding Head for Drilling Polishing Carving Engraving Tool Burrs Set<br> Material: Made of high quality high speed steel with high hardness, high wear resistance and high heat resistance<br> Professional Tools: There are 20 rotary burrs of different shapes and sizes in this set to meet your various craft creation needs<br> Easy To Use: Exquisite design and easy to insert process, very easy to use. Much more efficient than manual polishing<br> Save Energy – Sharp Rotary file and texture is deep, friction can be greatly enhanced when in contact with wood, improve efficiency and save energy<br> Wide Application: Can be used to process metal, glass, jade, plastic, wood for engraving, chamfering, grooving, reaming, hollowing and other engraving operations<br> Color: Multicolor<br> Size: Length 39mm, Shank Diameter 3.1mm<br> Quantity: 20pcs<br> Kind tips:<br> 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering.<br> 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding.<br> 3. Only the above package contents, excluding other products.<br>