Different types of circuit breakers and how to lock them out

Are Circuit Breakers Interchangeable two breakers in one slot Single-pole breakers are thinner and have a single switch for onoff positions A double-pole two breakers in one slot 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 shelving Double-pole breakers are double-wide breakers that take up two slots in the breaker box They have a toggle switch that's twice the length of