The Snap-on Tach Dwell My816B is a high-quality diagnostic tool designed for vehicle maintenance and troubleshooting. As a trusted brand in the automotive industry, Snap-on ensures accurate and reliable readings with its tachometer and dwell function. This product is essential for mechanics looking to efficiently diagnose and repair vehicles, providing precise measurements for a range of automotive applications. With the manufacturer part number My816b, this tool is a valuable addition to any garage or workshop. please study the photos as these are part of the description any questions please ask