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  • 02/09/2020

    Practical extended SDS drill bit to create precise long holes; using the longer adapter to penetrate almost 16 " of concrete for the 2" size. Cooling is essential, plain water sufficient. This job was done by creating smaller pilot hole and inserting small tube from the other sides backside and feed small amount of constant flow water. The friction was reduced and a smaller SDS Drill unit sufficient performing the job, the flow carried out the ground up concrete debris as you watch and check. The hollow drill leaves a central rod shaped waste which can be broken off and removed at intervals as drill job progresses. You can contract out, rent the tools but in the end buying the diamond Core drill Bit was the best economical choice Excellent item to buy

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