Fangrui Product Details Enhanced Design: Our 5-flute Design With 5 Blades Offers Smoother Drilling And Cleaner Cuts, Reducing Chatter And Providing Chamfers On A Variety Of Materials Including Metal, Wood, And Plastic. When Drilling Metal, Cutting Oil Help A Lot. Versatile Sizes Angles: This Comprehensive Set Includes Sizes 1/4inch, 3/8inch, 1/2inch, 5/8inch, And 3/4inch With A Universal 82-degree Angle, For Cutting Countersink Holes At An 82-degree Angle, And Screws, Bolts, Or Other Fasteners Can Be Properly Seated Or Hidden, Resulting In A Smooth . 1/4inch Quick Change Hex Shank: Equipped With A 1/4inch Quick-change Hex Shank, Our Drill Bits Lock Securely Into Impact Drivers And Quick-change Chucks, Enhancing Grip And Minimizing Slip. Portable Well Organized: 5-piece Countersink Drill Bits Are With Size Identification And Well Oiled For Anti-rust Purpose Colour:photo Color Material:steel Package Contents: 5x Countersink Drill Bit Only The Above Package Content, Other Products Are Not Included. Note: Light Reflect