Carlon B618R-UPC 4-1/4" Round Box, Old Work, Cubic Inches: 18", Non-Metallic

Works like a charm. I was renovating my bathroom and found that they had not used a box for the vanity light when they built the house. Unfortunately the studs were not close enough so I opted for one of these and glad I did. With a w.25 hole saw, I had the new light done in about an hour (assembly included). I WOULD definately purchase these again!

Nice size box for ceiling installation. Biggest convenient plus was the enclosed stencil for the electrical box. Cut out exactly to the stencil was a perfect fit.

Great for adding a light to a finished ceiling.

Good product. Good value. Does the job

Easy to use and install. Used to install light fixture over mirror in half bathroom. Super easy. Great product.

Perfect size installed it in 3/8” plywood clamped on perfectly wire slid in and holds well fair price would buy again I’ve used these type many times their are poor quality boxes out there this isn’t one of them

I can see why there's a debate about using a 4" vs 4.25" hole saw for this. After reading reviews from a few vendors, I went with 4.25" and it worked fine but it was almost too big. But then I saw they make 4-1/8" as well. That's what I would go with if I was to do this again. Also if the drywall you're cutting through has plywood backing, make sure it's not over 1" in total thickness and you'll be fine.

Upon removing the old fluorescent light fixture there was no round box in the ceiling to install the new lighting fixture. Ordered this unit which was easy to install and was perfect for the installation of the new light fixtures. Give to credit to you tube video for finding this round box since home depot nor lowes carried this item.

This product was used in replacing a builders bathroom vanity kight with a new one. The box was necessary to mount the light and keep things safe. Remember to work the three clips to get them moving and avoid any snaps. I would buy this product again.

Nice product

It was my first time mounting an electric box, and was not too sure if I would get it right. I was kind of surprised to get it installed on the first try. The flaps opened up all the way and the box stayed put and leveled.

Solude

Ordered this item after removing a ceiling light that didn't have a junction box or mounting stud. The 3 clamp screws holding the box to the drywall were really tight so turning them back + forth before installation loosened them up and made installation much easier. A hard to find item here - dinging it a star due to the price.