S29354 is a PowerPacT H/J-Frame Mechanical Interlock for Toggle Handle. This is a PowerPacT accessory for H-frame & J-frame breakers. This accessory has UL Standards. The rotary handle has adirect mounting style PowerPact H/J-frame circuit breakers can be used with a variety of internal and external accessories to increase application versatility. Circuit breaker internal accessories are available either factory installed or field installable. They can be installed in accessory compartments behind the circuit breaker accessory cover. This accessory Certified to UL Standards. The PowerPacT Advantage. Proven Performance, Industry-leading circuit breaker innovation and protection for heavy-duty commercial and industrial applications. Smart, Integrated metering options provide a cost-effective solution to reduce energy consumption, optimize energy costs, and improve energy availability for your facilities.