Details:* .* The discharge space of drilling waste is large, the resistance is small, and the discharge of impurities is stable.* Use high-quality materials and grinding technology to make the blade sharper, reduce the cutting force and drill breakage, and improve the quality of the wall hole.* Calibration ring design to improve working efficiency * Strictly avoid local holes and ensure the quality of trimming.* Long service life, 2000-5000 drill bits can be drilled under normal working conditions, and can be reground 4-5 times.* Suitable for drilling acrylic board, wood board, pvc board, circuit board, aluminum board and other materials.* Color: As pictures show * Material: Carbide Coated * Packing Size: 88*53*10mm/3.46*2.09*0.39"* Optional Size: 0.1mm,0.2mm,0.3mm,0.4mm,0.5mm,0.6mm, 0.7mm,0.8mm,0.9mm,1.0mm Package Contents:1Ages 0* PCB Drill BitsNote:The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.