new and high quality High Speed Steel Material made Surface with Titanium Coated Round shank is suitable for most electric drill machine Different size of drill can make different size holes Applying to drilling hole on the wood,thin plastic,Aluminum alloy etc Sharp edge, you can drill wood and other thin plate, but also in the horizontal drilling after drilling. Material:high speed steel Surface material:Titanium Shank shape:round Drill Size:3mm,4mm,5mm,6mm,6.5mm,8mm Length:10cm Weight:80g Color:silver+gold Specifications: High Speed Steel Material Surface with Titanium Coated Suitable for most electric drill machine Different size of drill Round shank Drill Power Tools Package Included: 6 x Drill Notes: Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Please leaving a message before you give the bad feedback, if the products have some problems. Thanks for your understandings.