Hongliang drill bit set.This set contains 30 drill bits,which is a great choice for anyone in need of micro - drilling services. The diameters of these drill bits range from 0.1mm to 3mm.This wide range allows you to handle various drilling tasks with different aperture requirements.Whether you are working on a PCB board for electronic manufacturing,creating beautiful jewelry pieces from amber,jade or other precious stones,or involved in micro - precision machining of small molds and electronic components,these drill bits got you covered. What makes these drill bits stand out is their material.They are made of high - quality tungsten carbide.Tungsten carbide is well - known for its high hardness and excellent wear resistance.As a result,these drill bits can stay sharp for a long time,ensuring consistent precision in your drilling operations.You won't have to worry about the drill bits getting dull quickly and affecting the quality of your work. Another advantage is its user - friendliness.These drill bits are designed to be easily used with hand - held drills like hand - twist drills.So,whether you are a hobbyist who enjoys DIY jewelry making or a professional precision machinist working on complex projects, you can operate these drill bits with ease. Compared to ordinary drill bits on the market,our Hongliang drill bits focus on micro - aperture precision processing.The combination of the specialized design and premium tungsten carbide material gives them an edge in terms of precision and durability when it comes to small - diameter drilling.You can achieve more accurate and high - quality results with less effort. In conclusion,the Hongliang drill bit set is a versatile,high - quality and user - friendly product that meets a wide range of micro - drilling needs.