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Item: Diamond Vacuum Brazed drilling core bits
Specification & size: Diameter 6mm+8mm+10mm+12mm 1pc/each size, 10mm round shank
Quantity: 4pcs
Application: Wet drilling for granite marble masonry ceramic tile glass....
Feature: 5-10times drilling life than electroplated drilling bits, 50%-70% higher in efficiency than traditional drilling bits
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