Twin breakers

The two Breakers in one space are exactly what it says on the tin They are separate Breakers with separate trip I have never seen double stuff

Is there a special one for connecting two 1 GE breakers together Is that 4 slot branch breaker style compatible with all Homeline panels?

two slot toaster There are code limits on the number of circuits you can have in one residential panel And remember that both circuits are on the same phase

two slot shelving Both “hots” need protection from overcurrent, so we use a double-pole breaker that accepts two wires instead of one These breakers are larger