https://www.bluerocktools.com/blueroc...

Max Drilling Diameter: 8"
Rated Voltage: 110V, standard 3-Prong plug
Rated Frequency: 50-60Hz
Rated Input Power: 2400W
Speed: 750 RPM

Structure and Features:
New improved water hose assembly with metal fittings and hardware for "wet" drilling
2 Wrenches, 3 hex wrenches, 2 spare motor brushes
Drill press both left and right side compatible
Adjustable Top Bolt for binding into ceilings
Water Spigot for use with Standard Garden Hoses
This is a heavy duty drill with high output for concrete, asphalt and masonry drilling. Reinforced concrete with rebar
This is a brand NEW 8" portable coring drill with a stand. It's a high quality high output unit.

These drills use the standard 1-1/4" threads used by most concrete core drills. They are designed to drill through reinforced concrete masonry, assorted brick and block as well as other types of rock.

Review Posted by Mindmatrix on 21st Dec 2021:

"Over 400 cores and still going strong!!! Bought the Bluerock Tools model 8Z1 around 4 years ago. Used to drill hundreds of holes in commercial construction. Holes range in size from 1" to 8" with most around 3" to 5". At depths between 3" to 21". A 12" bit extension was used for holes deeper than 11". This drill has done absolutely fantastic, exceeded all expectations. Most cores done on 5000 psi or greater concrete at commercial airports. The Drill has good power and a great safety clutch. This is the drill to get if you need to core quite often but not every day to make a living. Replacement parts are easily available but I have yet to replace a single part. I strongly recommend purchasing the vacuum base and vacuum pump to secure the drill to most floor conditions without needing an anchor. Only problem I ever had is it sometimes trips 20 amp breakers if pushed to hard or trying to go to fast. I have used many brands of drills, some cheaper and some costing as much as 5x the cost of this drill."