10 In 1 PCB Tungsten Steel Drill Bits, Size: 1.1-2mm

10 In 1 Tungsten Steel Drill Bits, Size: 1.1-2mm1. Convenient opening, safe and efficient, strong wear resistance, durable2. ral groove, sharp edge, large ral groove design, prevent chip accumulation3. ing ring, reduce the time of hine debugging4. Anti-vibration design of the edge to reduce the vibration of the hining process and improve the surface quality5. Neat and burr-free surface, strong anti-vibration6. Material: tungsten steel7. Scope of application: amber swax, circuit boards, Bakelite, CNC engraving plexiglass, jewelry, and plastic drilling processing8. Size: length about 3.8cm, shank diameter about 3.175mm9. Weight: about 40g / set

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