BLUEROCK Core drilling extensions.

1-1/4" Threaded Long Extensions (Fit Bluerock WET type bits and all Z1 core drills):
6" https://www.bluerocktools.com/6-152mm...
12" https://www.bluerocktools.com/12-cori...
16" https://www.bluerocktools.com/16-cori...

5/8" Threaded Extensions (Fit Bluerock DRY type bits):
6" https://www.bluerocktools.com/6-corin...
https://www.bluerocktools.com/12-cori...