20 Pcs 0.1-1.0mm, 1.1-2.0mm PCB Printed Circuit Board Tungsten Carbide Micro Drill Bits Mini Twist Drill Bits Set Engraving Metallurgy for Jewelry CNC Engraving

High quality: The PCB drill bits are made of high-quality tungsten steel, which is highly wear-resistant, has high hardness, bending strength, is corrosion-resistant, and offers high working efficiency.

Good packaging: The high-quality plastic box provides easy transport and better protection, preventing the drill bits from being damaged during delivery.

High precision: The PCB drill bits have sharp edges. The spiral groove cutting edge reduces cutting force, prevents breakage, and improves machining accuracy.

Widely used: ideal for cleaning 3D printer nozzles, amber beeswax, printed circuit boards, bakelite, CNC engraving plexiglass, jewelry, metal plastic, and other precision drilling.

Multiple sizes: this set contains 20 drill bits in different sizes: 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, one piece of each size.