(4 Pack) 4 x 2 Inch Single-Gang Metal Handy Electrical Box, 1-7/8" Depth, Drawn Steel Construction, 1/2" Knockouts, Surface Mount Utility Box

Yep it’s a single gang box

La cajas de electricidad tienen buen material, consistente, muy fáciles de poner y por sobretodo cumplieron su objetivo, te lo recomiendo

Not much to say. Good solid box for duplex outlets and junctions. Easy to use.

Good quality. They fit and worked as one would expect. No problems

Not sure this should be called an old work handy box. You will have to cut out the wall beyond the outlet hole because the bracket mounts via holes at the top and bottom. Most of these that I've seen have a lip to help you set the depth on the stud so that the right amount sticks up into the drywall. This doesn't have any depth setting which makes it convenient if you're doing non-standard depth mounting, but I think 90% of people are going to prefer having a lip. Functionally the box is fine other than that. It seems sufficiently stiff so you shouldn't have any worries about flexing or cheap materials being too thin. It's packaging didn't survive the shipping pouch but it's a tough piece of Steel so that's not a big deal unless you're trying to resell these.

good enough quality

This is good

i'm installing them in a pole barn, so not behind any dry wall. they mount just fine with a few fasteners (not included) to the 2x4 & 2x6 wood. the boxes come with 2ea fasteners for the cover plate (which is also not included).

They come without a bonding screw, but useless philips short device screws that need to be removed before installation? Smaller than normal handy boxes.

These boxes are great for adding a new receptacle, the is no grounding screw you have to provide your own.

ground screw mising