Diamant Boart Ultra GB Wet Diamond Coring Bit

* Limit quantities available - No Longer In Production *

Our Most aggressive drill bit for granite, concrete or any other hard stone.

Diamond Coring Bit Features:

  • Excellent for drilling in granite and porcelain
  • Designed for drilling the faucet-mounting holes in counter tops and vanities, and to make clean rounded corners for square or rectangular sinkholes
  • 5/8" thread female arbor, fit all wet polishers
  • Use wet only, operating speed is between 1800 and 2500 rpm
  • Fits most wet polishers
  • Total Length: 4". Cutting Length: 3-1/2"
  • The 3/4" and smaller are crown bits while the 7/8" and larger are laser welded segmented bits
  • We recommend a template be used when drilling free-hand and a scrap piece of stone be clamped under the stone to prevent excessive chipping on the backside of the stone

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Based on 2 Reviews

Most Helpful Reviews


really good hole saw

this holes saw is really amazing works perfect in porcelain tile thanks a lot for a good stuff

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Quality Hole Saws

I recently ordered 3 of these hole saws: 1-3/8", 2-1/2", & 3-1/2". I used them to drill some very dense, very brittle porcelain. They worked beautifully on my Makita's slowest speed. I bought the adapter to use the hole saws with a 1/2" drill, but have yet to use it.
If you need quality hole saws at a reasonable price look no further.
-Matt in L.A.

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