Hello John, we are sorry to hear about this. Could you send us an email at firstname.lastname@example.org, so we can assist?
I have used it on 4 inch thick stone and 3 inch brick for dryer vents but I have not used it on concrete. I would have no problem using it on concrete but beware of hitting reinforcing steel in the concrete.
Hi Joe! Yes, this bit is intended to be used with our SDS-Plus rotary hammers.
No. Your max size of a core bit is 2-1/2" on an SDS Plus 1" rotary hammer.
There are 2 shafts available. The 13" shaft is part # 48-20-3582 and the 18" shaft is part # 48-20-3593.
This bit is for rotary hammers, not hammer drills. It will not work in a hammer drill.