Is it possible to connect two breakers in one panel board

I have one of these thin dual circuit breakers Can I only two breakers in one slot The duplex breakers provide two single pole breakers in the space typically required for only one standard breaker These duplex, 12-Inch frame breakers are two slot toaster Yes, breakers are moved around all the time The slots are all identical so the breakers don't care which one they are mounted to

two slot shelving A tandem CB only requires one slot but would still count as two poles rmeier2: Maximum Number of Overcurrent Devices A panelboard