Features:*100% brand new and high quality*Made of high quality material, durableand practical to use*Tungsten alloy steelHigh hardness, high strength, advanced grinding technology, durable*Locating ring designHumanized positioning ring design reduces machine debugging time and improves work efficiency.*The anti-vibration design of the cutting edge can suppress the vibration generated during machining and improve the machining accuracy of the surface.*The design of the helix angle effectively prevents the occurrence of accumulated cuts and improves the processing quality.*Exquisite product appearance packaging, environmental protection and safety, better protection of this product, avoid damage during transportation and handling, and better delivery to your hands.*Product use: stainless steel, copper, amber beeswax, plastic, circuit board and other surface processingSpecifications:Name: PCB Drill Bit SetShank Diameter 3.175mm,(Approx.)Total Length ± 38mm(Approx.)Material: CarbideDrill Diameter: 0.1 ~ 1mm Ten ModelsWhether Standard: YesPackage Contents:10*Mini DrillNote:1.The real color 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.2.Please allow slight manual measurement deviation for the data.