Ritchie Engineering Company, Inc. is a leading worldwide supplier of U.S. designed and manufactured tools and equipment for the HVAC/R and automotive industries. We are committed to providing our customers with innovative quality products, ongoing training and education, and superior service. We continually strive for excellence while developing and nurturing successful relationships through honesty, trust and respect. YELLOW JACKET® has been manufacturing HVAC/R and Automotive Service Tools for over 75 years. Refrigeration tools that are engineered to be the best.