Feature: 1. The twist drill has a 0.8mm ultra-small drill bit, which can be used for vertical deep hole processing. 2. The incisive cutting edge and the large spiral notch design make it easy to remove chips and make the hole smoother and faster. 3. The humanized positioning loop design can reduce the debugging time of the machine and achieve precise opening. 4. The anti-vibration design of the cutting edge can slow down the vibration of the machining process and improve the quality of the machining surface. 5. The drill bit made of alloy tungsten steel has high hardness and wear resistance, which can avoid breaking during use. Specification: Item Type: PCB Drill Bit Material: Alloy Tungsten Steel Specification: 10pcs Approx. 0.8mm / 0.03in Processing Range: Accuracy drilling of beeswax, circuit boards, combination board, CNC engraved plexiglass, jewelry, hardware and plastics, etc.. Package List: 20 x PCB Drill Bit Note: 1. When drilling the hole, follow the vertical direction. Do not use too much force. Slowly twist the hole in one direction by hand. The needle can not be broken or pried hard, otherwise it will be easily damaged.2. It is not allowed to be clamped on a hand electric drill for high‑speed rotation and drilling, otherwise it will collapse.3. When punching holes, be careful to clean up the surrounding powder while rotating.4. Grasp the tail of the drill bit by hand and slowly rotate and drill. When it is about to get through, pay special attention to reducing the speed and strength.5. If the needle feels tight when it rotates, please withdraw the needle and re‑enter the powder after cleaning the hole.6.The color of the product fixing accessories will be shipped randomly.