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Layer of GMB on a barrel makes it much easier to drill the harder material.
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Perfect finish. 'Clean cutting' and 'Chip Free' are guaranteed.

 
Outer Specification
Remarks
Height
Thickness
Length
 1. Wet Use Only
2. For granite, Concrete
3. Custom-Made Size
    is also available
4. Attachment:1/2"Gas,
    M14,M16,5/8"-11
ик10~110mm
 10 2.5
110.0
Core Drill GMB Core Drill
Core Bit Adaptor-CB