Review on BRFPP Electrical Circuit Breaker Knockout for Corporations by Brandon Skeet

Fits snugly on my GE, Siemens panel (I have two different panels from the extension in my house), it fits but hangs a bit. I installed them before hanging the panels as I have them downstairs so it wasn't too bad. The GE was tight enough that I imagine you might force the tabs into place if you can't insert them at an angle. Siemens they don't fall out, but they can move up and down, so they're probably leaning against each other or switches, which is fine, better than looking for others or having free space. The price here for 5 packs is higher than the local hardware store. Although I wish it was a single in the package. Maybe 4 double rooms and a single room? :)