Works great. Great price. My electrician installed it. My 30 year old panel breaker fried. It was exact replacement for main circuit breaker for 200 Amp Bryant panel. This new replacement breaker fit exactly and now we have power at our house again. Connecticut Electric UBITBFP2002 TBFP2002 2P 200A MAIN UBI Replacement Breaker for Zinsco Type QFPGreat price, quick shipping, happy with purchase!