50Pcs Carbide Micro Drill Bits Set Print Circuit Board PCB Drill Bits 0.5-0.9mm Spiral Flute CNC Router Bits Easy to Use E7CBOOTDTY Features: The PCB drill is made of high-quality tungsten steel, with strong wear resistance, high hardness, high bending strength and high work efficiency. This miniature drill is designed for drilling and engraving on printed circuit boards and other precision work. The shock-resistant design of the blade makes it stable during the engraving process. It can be used in PCB, SMT, mold, hardware processing, electronic industry, etc. A set of 50 pieces contains 0.5mm(0.019'')/0.6mm(0.023'')/0.7mm(0.027'')/0.8mm(0.031'')/0.9mm(0.035'') size to meet different needs. Specification: Material: Plastic + Stainless SteelSize: 0.5mm(0.019'')/0.6mm(0.023'')/0.7mm(0.027'')/0.8mm(0.031'')/0.9mm(0.035'')Package Includes: 50 Pcs Micro Drill Bitsnote: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.