Feature: 1. The product bring convenient opening, safe and efficient, strong abrasion resistance, durable 2. Of sharpness cutting edge and large spiral groove design can prevent the generation of built‑up edge 3. Using humanized positioning ring box design, reducing machine debugging time 4. The anti‑vibration design of the cutting edge can slow down the vibration of the machining process, improving the quality of the machined surface 5. Adopt alloy tungsten steel material, can be used for accurate drilling processing such as amber beeswax, circuit boards, synthetic cardboards, CNC engraving plexiglass, jewelry, hardware and plastics Specification: Item Type: Twist Drill Bit Material: Alloy tungsten steel Specification: 1mm Processing Range: Accurate drilling of amber beeswax, circuit boards, synthetic cardboards, CNC engraved plexiglass, jewelry, hardware and plastics, etc. . Package List: 10 x Twist Drill Bit (Random Color) Note: 1. When drilling the hole, it should be in a vertical direction. Do not use too much force. Slowly twist the hole in one direction by hand. The bit cannot be broken or pried. Otherwise easily damaged2. Do not clamp it on a hand drill and rotate at high speed to make holes, otherwise the amber will collapse3. When punching holes, be careful to clean the surrounding powder at any time while rotating4. Grasp the tail of the drill bit with your hands and slowly rotate and drill. When it is about to get through, pay special attention to reducing the speed and strength5. If you feel the bit becomes tight when it rotates, please withdraw the bit and re‑enter the hole after cleaning powder.