This is a complete kit in Like new condition, only use a few times The Laser Tools Diesel Engine Compression Master Test Kit 4510 is a comprehensive diagnostic tool designed specifically for diesel engines. This kit includes everything needed to accurately measure compression levels and identify potential issues with a maximum PSI of 1000. Backed by a 1-year manufacturer warranty, this kit is reliable and durable for long-term use. With the trusted Laser brand name and high-quality materials, this compression tester is a valuable addition to any automotive tool collection.