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VEVOR Core Drill Bit, 4.25" Wet/Dry Diamond Core Drill Bits for Brick and Block, Concrete Core Drill Bit with Pilot Bit Adapter and Saw Blade, 9.5" Drilling Depth, 5/8"-11 Inner Thread, Laser Welding

Customer Reviews for VEVOR Core Drill Bit, 4.25" Wet/Dry Diamond Core Drill Bits for Brick and Block, Concrete Core Drill Bit with Pilot Bit Adapter and Saw Blade, 9.5" Drilling Depth, 5/8"-11 Inner Thread, Laser Welding

108 mm

Customer Reviews

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86 Review(s)
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Tunaoue Tunaoue
Heavy Cylindrical Boring
Had to bore a breather hole for tankless water heater through 8” of solid concrete. Drilling horizontally about eye-level, this is a heavy boring tool, difficult to handle, so I built a wood fixture to help target and hold the weight. I think the bit can be used wet or dry, in my case dry cutting was my only option. Lot of DUST, so wear a breather mask and eye protection. I wore ear plugs too because it was an enclosed shed. The task took a week, about 20-25 hours of actual powering (slowly) through about an inch per day. If the drill angle is a tiny bit off, the whole thing BINDS UP and stalls the drill. I could stand and push the drill with my back leg braced agains the rear wall for maybe 10 minutes at a time before I succumbed to the fatigue. Rest for 5 - 10 minutes, and resume the attack. You’ll need patience and persistence because (in my case) it was literally a long, . . . hard, . . . grind.If your project is straight down into a concrete floor, your results will probably be more efficient.
G. T. Bauer G. T. Bauer
Works
I bought this with the intention of drilling a single hole through a hollow concrete block for a dryer vent. For that purpose, it worked like a charm. I was able to get through the front half off the block before burning out my cheap 20 year old drill. Another better drill finished the back hole.I saw one review that said the drill bit was too short. That was not true for me.I cannot speak to the longevity of the bit, but for the single hole I needed, this was a great value.
JANE B JANE B
Make life rasy
We were boring through concrete. This bit make it easy and effortless!
Customer Customer
Awesome!
Works great. Use a wood template. Duh.
Ag Ag
Core Big
Great looking drill bit, especially for the price. Teeth a little thinner than expected, but will give it a try.
Terry Singleton Terry Singleton
Good product
Good product would recommend to anyone
Larry Jenkins Larry Jenkins
My job I purchased it for has been delayed.
I’ve not used the coring unit yet, but that free 4” Diamond disk is dynamite; I’ve used it 3-times now, very impressed.
KYBIKER KYBIKER
Worked to core a 8" solid concrete wall.
I used this to core a hole through a solid Concrete Basement wall for a Split Unit A/c.....took about an Hour...with a smaller Bosch Rotary Hammer......I only used the Hammer feature occasionally....and Drilled it Dry...Excellent Product!!
MB MB
Easily bored through a 3 wythe red brick wall
The core bit cut though the brick without much difficulty. The pilot drill however does stay lock into the adapter regardless how hard I tightened the hex screw it always wobbled free. Only used it once so no real review on longevity or durability.
Dingo Dingo
Diamond Drill
Worked perfectly and even cut through the steel reinforcing rods embedded in the blockfilled concrete walls . Top product , even the tradies were impressed.

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