Is BRS highly overpriced or is this a different product

[BZOFIQ]

Anybody recommend a particular diamond drill bit? Also, I plan on drilling the tank indoors and can’t have water going all over the place. Any recommendations?

I've used the ones off a AtoZ without issues. Bulk reef supply has them in all sizes matching the different bulkheads they sell.

 

[Kris 2020]

Yes, that’s what I said. The 2.5 inches is not the chuck size. 3/8 inch and 1/4 is.

Picturing a drill with a 2-1/2” chuck

 

[JCTReefer]

Picturing a drill with a 2-1/2” chuck

Right!!!!! Man, our fab shop at work has some pretty big drill presses, end mills, lathes, etc.
A 2 1/2 inch chuck would indeed be huge. Lol.

 

[Dr RBG]

There are 2 chucks to consider. one on your electric drill and one on the device. The diamond hole saw shaft has to fit the chuck on the device probably 1/4 to 3/8 inch. The cutting part of the hole saw has to fit through the hole in the bottom of the device. Both devices have about the same size hole 60mm = 2.36" and the other says 2.5". That is the maximum diameter of the diamond saw you could use. I am willing to bet they are both made in the same factory in China.

 

[Dr RBG]

By the way, if you look carefully they are both branded Wolfcraft!

 

[Ricky_Reef]

I find Walmart.com has sometimes better prices than Amazon on the same exact items.