2pcs 9.7mm Brazed Diamond Core Drills for Extension Holes M14 thread

SKU: A8691001x2


Quantity: 2pcs


Dia 10mm,   M14 connection , with water slot


Dry/Wet drilling for granite & marble, concrete, ceramic

The drills used for loaded back bolt stone extention holes, make the back bolt holes which bigger insider.


1.Fast and Smooth drilling, 

2.Long lifetime ,Less Chipping 

3.Minimizing any breakage 

4.Less loss of material

5.Less heat generation

6.Better finish quality 


Standard Free Shipping:

US&CA 10-15 Days | MX 15-30 Days | AU&NZ 8-15 Days | Europe 5-15 Days

Expedited Shipping:

If you need DHL Express,
Contact us now: Whatsapp: 189 5255 1577 Email: support@shadiatool.com or online chat.


Q:What material can this drill bit work on?

A: SHDIATOOL drill bits usually are able to work for various materials, please check our product description and product image to see details.

Q:What difference between red and gold and blue?

A: SHDIATOOL drill bits have different colors drill bits, but they are same quality.

Q: How can I know if this drill bit is suitable with my machine?

A: Please check your machine manual on the thickness and size of/where the arbor is, make sure these details is fine with this drill bit. Don’t worry if you have problem with the thread, SHDIATOOL has adapter solution for you too.

Q: How long can drill bit last?

A: Proper using and maintenance helps your SHDIATOOL drill bits work longer, make sure it under MAX RPM and nice temperature while working.

Still have questions? Contact us now: 189 5255 1577 support@shadiatool.com or online chat.

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