Designed for versatility and ease of use, the McQuay-Norris AD-6548 Compression & Vacuum Tester is an essential tool for both professionals and enthusiasts. It's equipped to service a range of vehicles including motorcycles, ATVs, passenger vehicles, and heavy-duty/commercial engines. The tester features a rubber cone ends accessory for secure attachment to various engine ports and a pressure release button for quick adjustments. The unit is crafted in the United States and boasts a robust 180 PSI compression and 30 PSI vacuum measurement scale, ensuring precision and reliability. Its multiple measure scales accommodate a range of engine types, while the vacuum function helps diagnose vacuum-related issues. The product's manufacturer part number is AD-6548, and it's important to note that it comes without any warranty.