1、Accurate and Reliable Measurement: The petrol engine cylinder compression tester kit ensures accurate and reliable cylinder pressure readings across a wide range of vehicles. 2、Versatile Use: The engine compression tester kit is widely suitable for most types and depth of spark plug fuel engine cylinders on gasoline, can be used for motorcycles, cars, ATVs, snowmobiles, SUVs, lawnmowers, chainsaws, etc. 3、Durable and User Friendly: Constructed with premium metal and rubber materials for durability, the engine cylinder compression gauge tool is designed for easy and hassle free operation by professionals and DIY enthusiasts. Built in check valve with pressure holding function ensures maximum pressure at spark plug during compression. 4、Clear and Easy to Read: The petrol engine cylinder compression gauge ensures clear visibility of accurate readings in the 0 to 300psi range. Allows for easy reading even in low light conditions. 5、Portable and Compact: The petrol gas engine cylinder pressure gauge is equiped with storage box, compact size, easy storage and portability. Ideal for on the go professionals or hobbyists.