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Review on 9.5" Diamond Dry Core Bit For Brick And Block With SDS Plus Pilot Bit Adapter, 5/8"-11 Arbor And 9.5" Drilling Depth - Perfect For Concrete Drilling by Matthew Maxwell

Revainrating 4 out of 5

be sure to use low speed

I made 15 clean holes through hollow block and brick using low speed drilling and it was still cutting good,(High speed drilling will cause premature wear). I lent the bit to another contractor and found out later that they use it on hammer drill setting and completely ruined the bit after one hole.

Pros
  • Drill Bits
Cons
  • Requires a lot of maintenance to keep the diamond core in good condition