Core bit worked fine initially, however after using it on about (10) 7/8”Holes in paver brick the 7/8” OD (actually .835) pipe became very tight as though the bit diameter was getting smaller as more holes were drilled. Eventually a reaming technique needed to be used to keep the hole large enough so pipe could slide through. Water from a GH running over the drilling area was used the entire time during the drilling process
4 years ago
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