Stab-lok breakers are fully interchangeable with all past breakers and deliver the same proven quality. This breaker will work only in Federal Pioneer Stab-lok branded residential panels. Typical application for a double pole 60 Amp breaker include feeding a sub panel device such as a 4 circuit 60A Stab-lok sub panel. Provides overload and short circuit protection (240Vac). NA 2 Pole breakers take 4 spaces in a Stab-lok panel. 10,000 Amperes Interrupting Rating (AIR). Lug Range: #14 - #2. Thermal magnetic trip protection.