PRICES MAY VARY. Compatibility: all shank size is 3 mm, allowing them to be compatible with most die grinders and rotary tools as you finish, grind, and shape your work effectively; Just install it like any other typical drill bit and bring you much convenience Engraving drill bit set: you will receive 10 pieces/ 2 sets wood carving and engraving drill accessories, which are enough for you to use, and help you to make kinds of crafts without breaking the wood, get a nice finished craft…