The Vintage 1960's Dixon Inc. Analog Engine Performance Analyzer is a diagnostic tool designed for analyzing the performance of passenger vehicles and heavy-duty/commercial vehicles. Made in the USA, this analog engine analyzer comes with clamps for easy connection to the vehicle. The brand, Dixon Inc., ensures quality and reliability for diagnosing engine issues with its classic analog display type. Perfect for automotive enthusiasts or professionals looking for a unique and authentic tool to help maintain and diagnose engine performance.