Wet Concrete Diamond Core Drill Bit for Concrete Stone Granite Marble

This bit worked just fine to drill my 2 holes 4” deep. But I feel the need to explain to folks, that YOU MUST HAVE A CORE DRILL TO USE THIS BIT. You cannot use a core bit (like this one) with a regular drill. And there is NO pilot bit nor could there ever be one. A core bit /drill uses a lot of water to cool the bit to expedite drilling. The water is fed thru the center of the shaft and the bit, so you can’t have a pilot bit. There is no adapter to use this with a hammer drill either, a core drill is a must. You WILL destroy a normal drill. And it will take you days to drill one hole.

I was thoroughly impressed with this bit. It cut through a 4 inch slab in 2-3 minutes and still looks brand new. This bit will last a long time based on my experience. Will definitely buy other bits from this manufacturer.

Size: 3″Verified Purchase Early Reviewer Rewards

i could not believe how quick this core bit cut through the side of the pool 12 inch thick.Took me about 5 min max.i forgot to add rebar was included in the cut

Size: 2 in  Verified Purchase

Worked as described, it is a slow process with a hand drill

These open up so many options for the price. I love having a set like this.

Would have liked the inside and outside dimensions.
Product preformed as designed.

Great product does the job
Drill two holes in no time just make sure water is running evenly

This product is Madewell not no cheap stuff

9. Honey Badger LSx

Works great. Good life on the diamond teeth.