Included 5 kind 50PCS professional PCB drill in this bit set. Practical and unique, fit for professional use perfectly. The drill bit set comes in an practical storage box, let you keep them more easily. Great for drilling PC boards, plastics, fiberglass, wood, metals, etc. Feature - : Made of source material, practical and unique, high strength, high hardness and endurance, fit for professional use easily and conviently. - Included 5 different size drill bits, you can choice the drill bits as you need. - Strictly symmetrical cutting edge: Conducive to efficient cutting and avoids drilling deviation. - 50 Assorted sizes: The drill bit set comes in different sizes for each for meeting your using requirements. - Universal: It can be use with PCB, , CNC, mold, plastic, copper, stainless steel, fiberglass, wood, metals, engraving, jewelry making and other precision parts processing. - Warm Tip: Dear buyer, Due to lighting effect, monitor’s brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Specifications - Color: As Shown - Material: Cemented Carbide - Size: 10.5 x 7.7 x 5.3cm. - Bit Size: 0.5mm,0.6mm,0.7mm,0.8mm,0.9mm Package list: 1 x set of 50 drill bits