Practical engraving drill bits: the package comes with 5 pieces wood carving and engraving drill accessories, and 10 pieces HSS carbide rotary burr bits, enough to use material: made of high speed steel material, and sturdy to use, not easy to break, offer nice cutting power to use; 15 Different shapes of bits are intended for faster wood removal, you can easily work with woods more faster; Fit for grinding, polishing, shaping and burnishing , plastics and rubber surfaces Different sizes to choose: our carving drill bit measures . 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 router measures about 1.5 inch/ 39 mm long, and the handle diameter is about 3 mm Convenient to use: all shank size is 3 mm, allowing them to be compatible with most grinders and rotary tools, to finish, grind and shape your work effectively; Suitable occasions: this useful set can be applied for carving and engraving drill bit, also ideal for beginners, DIY lovers and skilled people, to complete handmade carving making projects; You can also share them with your friends or family members Color:Silver Material:Steel Package Contents: 15 * Wood Carving and Engraving Drill Bit Set Only the above package content, other products are not included. Note: Light reflection 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.