Check this Milwaukee 48-20-5060 5-Inch Core Bit

Milwaukee 48-20-5060

I used this product to drill (10) through holes in 14"-thick concrete stem wall (we used the milwaukee extension bar and center piece). It works perfect! no water needed. In few holes, we encountered 1/2" rebars and the core bit (carbide) cut them. You do stop every ~3-in at a time to clear the concrete. We used the small milwaukee 1" hammer drill to drive the core bit (remember you are only cutting a thin curf so you can core 2-1/2" dia using a 1" rated hammer drill). Hope this was helpful.0 of people found the following review helpful. A 7-1/2 inch extension is available to allow for the deeper holes to be drilled Use Milwaukee 48-20-5060 48-20-6155 Center Pin and 48-20-6162 Guide Plate for Milwaukee 48-20-5060 positioning and starting Milwaukee 48-20-5060 the hole Milwaukee's Core Bits are ideal for large hole drilling where depth is relatively shallow Thin wall Use with SDS core bit shank 48-03-3555 Milwaukee 48-20-5060 (8 in.) or 48-03-3561 (12 in.) ... »» Read more...

» Check Discount Price.