ITEM NAME:20Pcs/set Micro Twist Drill Bits Set, Durable PCB Print Circuit Board Engraving Description: 20pcs/Set Steel PCB Car.High hardness, wear resistance, intensity and anti-bending. Suitable for wood, aluminum, plastic, etc. People always bought together with. Total length: Approx. Twisted flute will make the drilling be more easy and effortless.
