Review on Enhanced Concrete Core Adapter - Toolocity AD1112 by William Chavez

I had two 4 inch core holes. I don't have a drill. I've been considering renting one. From the holes I had to drill there wasn't enough room to mount a drill. I found this dry bit and adapter for the AD1112 bit although I was a bit nervous after reading some of the reviews saying their bit broke before completion and the thought that there was no pilot bit or centering tool gave. My first core hole was through a plastered wall. To center the core I cut a 4 inch hole in the scrap plywood with a hole saw, I placed the hole in the plywood over my core location and started drilling. The adapter fitted the 1/2" chuck perfectly and my Milwaukee bit was more than strong enough to power the hole saw. I used light to medium pressure and the crown just did the job. I was surprised at how well a dry crown can work..The paint has worn off but the cut surface looks good and should last me for years.The bit and adapter together cost me less than I would have spent on 4 hour rental of the drill and bit.If I do in the future If I need more bits for other hole sizes, I'll start looking right here.