On Thursday, August 1, 2013 10:10:46 AM UTC-5, Bob_Villa wrote:
On Thursday, August 1, 2013 9:23:15 AM UTC-5, Pete C. wrote:





If the block has the cored grouted (cemented) it aint' going through. An



extension for the bit should do the job if the hole size is at least



5/8" or so.



1/4 in. so I'm limited unless I go larger...

Has anyone taken the carbide end off...and silver-soldered it to a slotted rod?