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Use one hand to hold the drill bit in place. tighten the jaws of the drills chuck by turning the metal chuck key with your other hand in a clockwise manner. tighten the chuck jaws as firmly as possible. remove the chuck key, and take your hand off the bit. test the drill to see if it is drilling properly.

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Supplying finest excellent trade for core drill bit merchandise,we are specialist manufacturer in China.Wining a lot of the vital certifications of its business,our trade for core drill bit items are very best sellers with the neighborhood and international marketplace. If you have to have additional information about our factory and item list,please click the button bellow to verify for it.


We are an enterprise that export trade for core drill bit to China, we are approved by the relevant state registratio. Primary trade for core drill bit and sell to different regions in China, product out there upon request. We've got the spirit of "customer initial, honesty first" principle, using a quantity of enterprises established long-term cooperative connection.

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