#StepDrillBit #DrillBit #DrillBitSharpen
This is a video about how to sharpen a dull step drill bit.
How to easily sharpen a dull drill bit with just a file :
• 줄만으로 무뎌진 드릴 비트 쉽게 갈아서 ...
Thank you for watching.
#스텝드릴비트 #드릴비트 #드릴비트연마
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