Hey take a look at this Milwaukee 48-20-5045 3-Inch Core Bit

Milwaukee 48-20-5045

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. Milwaukee 48-20-5045 Milwaukee's Core Bits are ideal for large hole drilling where depth is relatively shallow FEATURES: 3 in Thin Wall Milwaukee 48-20-5045 Core Bits are available from 1 inch to 6 inch diameters Usable cutting depth 3 Milwaukee 48-20-5045 in. Use with SDS Milwaukee 48-20-5045 core bit shank 48-03-3555 (8 in.) or 48-03-3561 (12 in.) ... »» Read more...

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