The Snap-On MT1261A Timing Light Tach Advance Gun is a high-quality automotive diagnostic tool used for accurately timing engine cycles. With its reliable brand reputation and specific manufacturer part number, this tool is designed to provide precise and efficient service for troubleshooting and diagnostic purposes in vehicles. Perfect for mechanics and car enthusiasts looking for a trusted and durable timing light to help maintain engine performance. Powers on, works, one of the cables is frayed as you can see in the photos.