The Snap on MT2500-6900 Domestic FastTrak Transmission Troubleshooter is a diagnostic service tool specifically designed for troubleshooting and diagnosing domestic fast transmission systems. Made by Snap on, a reputable brand known for high-quality automotive tools and supplies, this device allows mechanics and car enthusiasts to quickly and accurately identify issues with their vehicle's transmission. The through 2000 feature indicates that this troubleshooter is designed to assist with transmissions up to the year 2000, providing valuable insights and support for automotive maintenance and repair.