55mm SDS Plus Shank Hole Saw Cutter Concrete Cement Stone Wall Drill Bit

Used with a hammer drill to cut a 60 mm hole in brick to run conduit. Worked great - except the bolt that holds in the center drill bit kept vibrating loose. The center bit would spin and and progress would stop until reassembled and screw tightened. 5 stars even with this issue because of the price. Maybe put the screw in with loctite the day before?Hole was clean. Please note the depth of the hole saw - if it's shown. 60 mm diameter was less than the depth of the brick. About the time I was going to bottom out the brick inside the hole saw broke so I could dump it out and keep cutting.

I purchased this 55mm hole saw to drill through an 8" reinforced concrete wall. While it took quite a while, I think the fault was my (relatively) underpowered DeWalt hammer drill which only had a standard chuck. The bit would occasionally loosen from the chuck, so I went and rented a bigger Bosch hammer drill which had the SDS Plus chuck. Despite wearing down 3 out of 4 cutting teeth on the outer bit, I made it through the wall. The final product was a smooth, clean hole. In my case, this was a one-time use, but to be fair, going through 8" of reinforced concrete may exceed typical use.I would have given 5 stars, but for the constantly loosening centering bit -- incredibly frustrating. The vibration caused the hex nut to come loose every 90 seconds, requiring me to stop, retrieve the bit (which became difficult when it was impaled 6" deep into the wall), and re-fasten it. There must be a better way to design this. I read, but did not follow, others' advice to use locktite on that hex nut. If I were to purchase again, I would DEFINITELY try that. Otherwise, a capable tool. And comparatively cheaper than others.

I bought it to make a hole in the stone veneer I was putting around the alcove where I am installed a free standing gas fireplace/stove to allow the gas line to project, and it worked perfectly. I first drilled the guide hole using just the center bit so I could drill from both sides (one side being very rough) and drilled through half way from each side. Perfect, clean results.

This drill bit worked great to core a hole in my 6” thick cement wall. Worked as well as much more expensive brands. I was very pleasantly surprised how well it worked and how low the price was.

The first thing I noticed when I unboxed it was a large burr on one of the holes. No big deal, but a sign of low quality and minimal quality control.I put it all together and it looked stout enough and fit in my SDS drill with no issues, but I noticed the guide bit was a little off center. Again, I wasn't too worried. I was using it to go through brick. I didn't expect perfection...I used it to drill through brick for some conduit. As I was drilling, the set screw came loose and the guide bit came out when I pulled out the hole saw. I thought maybe I hadn't torqued it enough the first time, so I went and got an adjustable wrench to tighten it all back up. As I did, the head of the set screw broke off when it got tight.I was able to finish my job, but I won't ever be able to get this set apart.Due to the quality issues, I can't recommend this hole saw, unless you are just looking for a disposable tool.

Used the to drill a hole for conduit through a stucco on wire lathe over OSB wall. Worked well and even drilled through OSB. Will work well for occasional use. Boring portion did not lock up again pilot portion.

I had to drill a 1 1/2" hole in my 5" thick concrete seawall.I first tried using the bit in my hammer drill that has a standard chuck. There was no way to get the bit in perfectly straight so this resulted in a wobbly, inefficient cut.I borrowed a rotary SDS hammer drill (or you can rent them) and it chewed through the wall in 30 seconds.Once you get the hole started, remove the centering drill bit and cut the remainder with the hole saw itself. Just keep it straight.This was a much better alternative than the uber-expensive bits at the big box stores, if you can even find the size you need.

Worked great hammering through a concrete wall. One time use, so I can't speak to durability, but it worked well and was as cheap as renting a tool.

Acheté pour traverser un mur de parpaings de 20cm pour passer deux tuyaux de piscine de 50 mm pour une pompe a chaleur de piscine, il s’est révélé efficace et n’a pas bronché.Du coup, il est encore comme neuf.

Pensaba que por el precio que tiene no iba a servir para lo que la compré y me equivoqué, ha ido genial, dura y un producto bueno.

Perfect for the job in needed to do

Prodotto con un rapporto prezzo/qualità eccellente. Rispecchia alla grande le mie aspettative. Consigliato.

They wanted over $20.00 a day to rent the big concrete diamond bit (which is hundreds of dollars) , so I bought this carbide one for cheap and it drilled over a dozen holes so far, still going. Great deal