General description High-quality PCB drill bit set made from tungsten carbide alloy steel, known for its wear resistance, high hardness, and anti-deterioration properties. The anti-seismic design of the blade edge ensures stability during engraving. This set includes 30 drill bits of various sizes, each with a 1/8" shank, suitable for a wide range of applications. Technical specifications Material: Tungsten carbide alloy steel Shank size: 1/8" Drill bit diameters: 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm Set composition: 30 pieces (3 sets of 10 bits each) Usage Suitable for drilling in amber beeswax, printed circuit boards, 3D printer nozzle cleaning, plexiglass, Bakelite, CNC engraving, jewelry, plastics, and other precision drilling tasks. Spiral cutting edge reduces cutting force and prevents tip breakage, improving