3 1/2 Inch Wet Core Drill Bit, 3.5" Core Bits for Concrete, 1-1/4"-7 Thread, 14" Drilling Depth Diamond Core Drill for Concrete with Rebar, Masonry, Brick Block,Cement, Stucco, Stone (89mm)

Arrived . I like the tool but I have not used in very demanding challenge so far

I bought the 2.5 inch core drill to make a hole for a 2 inch pvc pipe through the floor of my basement. Then I installed a Vivosun ducted fan to use as a radon pump. Works great and very cheep. It took probably half an hour of drilling to go through an 8 inch slab of concrete (with wire in it) using a battery powered drill, but it did the job. I used a water bottle to keep water in the hole and wash the mud out. Didn't take much water to keep the bit cool at the slow speed I was drilling.

We have started using these core bits with a hope and a prayer and so far they worked out extremely well for some large jobs that they have been used on. No complaints regarding quality or premature failure and we know core drills are highly abused on rentals on job sites. So far so good.

Working well.

Great core drill. 18 holes through an 8" block pored solid, and still has teeth at 50%. Half the price of name brand!!!

If you going to use it 3 or 4 times … it’s good MORE than that is pure garbage. Don’t waste your money.

Fantastic….6” hole in a 12” concrete wall done in 10 minutes with good water flow.

So far so good… Drilled 3 holes so far and it has worked very well and seems to be made very well. Obviously use it as you are supposed to and use water, otherwise the bits won’t last. And drill at a steady slow speed. Good value for the price compared to my local hardware store who wanted over $200 for one.

Cut nicely into granite boulders using water to lube and keep the bit cool.

Good quality core bit. I used it for Coring holes for interlock project for landscape lights. Works good and did about 45 holes no problems. Good price and quality.

Wasn’t sure how to attach this to a drill but found a socket that fit over the hexagonal end. Bought an adapter to get to a size my cordless drill could fit. - the bit worked good to provide the hole needed in a concrete driveway.

Awesome coring but for the price. I needed it to drill 8 inch concrete. Did the job good and still looks like you can drill another 10 holes. Took me 4 hours but it was mostly because my rotary drill was a little small and kept overheating.

Unless the bit I received was fabricated with the teeth slightly off ??? This bit is not a true 8" core, it cored out at 7-7/8 or 200 mm. Very frustrating when you need precise cores for poke through electrical floor boxes or pipe you will be needing to open the core up ever so slightly. Will be returning as I need a true 8" core bit.