Manufactured with advanced technology, high-quality materials, long service life; low cutting resistance, increased drilling speed, and easy chip removal.
This micro twist drill bits set is a perfect tool for fine drilling of jewelry.
7pcs in a set,different sizes for meet varied requirements.
the drill bits made of high quality material and coated with diamond particles have high hardness,not easy to break and durable to use.
Suitable for drilling jewelry,ceramic,glass,semiconductor materials,etc.
