Description:

[3in1 Set]: Diameter: 12mm / 0.47 inch, 16mm / 0.63 inch, 19mm / 0.75 inch. [Universal Shank]: Round shank fits most handheld and stationary drills.. [5 Flute Design]: Five flutes design reduces vibration for smoother drilling and extended life.. [Black Oxide Finish]: Black oxide finish for added corrosion resistance. Sharp and smooth cutting edge, high working efficiency.. [90 Chamfering Degree]: Precision ground 90 degree tip for countersinking most machinable metals like aluminum, woods, rubber and plastic..