Check the listing for details. 40pcs PCB Drill Bit Set 0.1mm-3.0mm Tungsten Carbide Micro Twist Drill Bits. Condition: New. Listed at 15.20 USD. Cutting edge diameter: 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, 1.5mmm, 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, 3.0mmShank diameter: 3.175mm / 1/8"Overall length: 38mm / 1-1/2"Material: Tungsten carbidePackage included: 4set (40pcs) PCB drill bits (2pcs of 0.1mm-1.0mm size,1pcs of 1.1mm-3mm size), 4pcs x plastic protective storage boxDescriptions:Long-lasting micro drill bits are made of tungsten carbide, providing a precise and easy experience, with high hardness, good toughness, wear resistance, high strength, resistance to bending and heat. The carbide material has cutting performance to ensure high working efficiency.