Recently I noticed a change in design in exposed work covers designed to hold receptacles. They now look like this, with these little tabs projecting into the receptacle holes:

I'd see these and idly wonder about them but didn't give it much thought until I actually needed to buy one today. I took it to the work site and got it out to use it, and then thought, Hey, where's the little nuts and bolts to hold the receptacle onto this thing?
And then the light dawned. Those little tabs ARE the nuts. You break them off and use the screws that come already tethered to the receptacle; and the rectangular shape is so that they contact the side of the cover as you start turning the screw, and you don't have to hold them to keep them from turning.
It's a brilliant design, much better than having a little packet with nuts and bolts. Less waste, easier to use. Smart!

I'd see these and idly wonder about them but didn't give it much thought until I actually needed to buy one today. I took it to the work site and got it out to use it, and then thought, Hey, where's the little nuts and bolts to hold the receptacle onto this thing?
And then the light dawned. Those little tabs ARE the nuts. You break them off and use the screws that come already tethered to the receptacle; and the rectangular shape is so that they contact the side of the cover as you start turning the screw, and you don't have to hold them to keep them from turning.
It's a brilliant design, much better than having a little packet with nuts and bolts. Less waste, easier to use. Smart!