High Quality: PCB drill bits are made of high-quality tungsten steel and are extremely wear-resistant. Wear resistance, high hardness, wear resistance, bending resistance, anti-change, efficient, high working pressure. Good Packaging: Packed in a high-quality plastic box, easy transportation and better protection prevent the blade tips from being damaged during delivery. High Precision: PCB drill bits have sharp edges. The sharp edge of the spiral flute can reduce cutting force, prevent drill bit breakage, and improve machining accuracy. There are no burrs or chips. Widely Used: Ideal for cleaning 3D printer nozzles, amber beeswax, circuit boards, Bakelite, CNC-engraved plexiglass, jewelry, metal plastic, and others. Precision drilled holes. Multiple sizes: This set contains 20 different drill bit 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, each size contains 1