Q-Line circuit breaker. Features a dedicated calibration screw which is cemented to prevent shifting. The attached screw creates a stable calibration for optimum performance. Tin-plated copper stab creates a reliable, permanent, and connection. Case is made of heat thermoset for stability and structural integrity. Box type terminals, trips to center position. Meets NEMA (National Electrical Manufacturer's Association) standards. ANSI (American National Standards Institute) and CSA (Canadian Standards Association) certified.