General description This 50-piece PCB Drill Bits Set is designed for precision drilling in various materials including circuit boards, jewelry, and metal. The set includes 10 different sizes ranging from 0.3mm to 1.2mm, with each size containing 5 pieces. Made from high-quality tungsten carbide steel, these drill bits offer excellent wear resistance and high hardness, ensuring efficient and clean drilling. Technical specifications Sizes: 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm Effective blade length: 5.5mm to 10mm Shank diameter: 1/8 inch (3.175mm) Total length: 1.5 inch (38.1mm) Drill point angle: 135 degrees Material: tungsten carbide steel Color: colorful Usage Ideal for 3D printer nozzle cleaning, circuit boards, bakelite, CNC engraving, and jewelry making. Recommended for use with precision machines such as desktop engraving machines and high-speed rotary tables. Handle with care, especially bits below 0.5mm as they are more prone to breakage. Other