OEMTOOLS 37138 Compression Tester Gauge Set, Compression Tester Automotive, Engine Compression Tester with Flexible Hose, 14mm and 18mm Adapters

No issues with quality. Blow molded case is nice. Instructions are on a little placard, no papers to lose.I just followed the instructions in the factory service manual (test with warm engine, pull fuel pump fuse, etc.) -- pretty simple!

Works great, nice quality compression tester. Seems to be well built... I just wish my engine values were more favorable :-P

Simple to use and accurate

Worked great first time I used it next time I got it out an used it and worked well but now the pressure release button sticks and won't work correctly my old one that I've had almost 20 years didn't ever have this issue disappointed in this one OEM TOOLS

Seems to be a really nice product, really happy with it. Doesn’t come with a lot of adapters for different sized spark plug holes

I needed a new gauge because my old one failed after 10+ years of service - Much better then the Harbor Freight I tried prior

This the same Kit as sold in the Red Carrying Case. I have used both, and they both operate and perform the same. This is a very good tool for the cost. It's the best price I found online.

The first gauge I ordered read accurate however the pressure release valve would sometimes stick so you would get out of the car to a test of 0psi. Gauge would hold pressure when it did work.I ordered a replacement. The replacement had a bad hose causing it not to work. I tested this gauge also and it read accurately. Using the hose from the first kit I tested it on an engine. It worked however it does not hold pressure and starts dropping slowly right after the test. The first gauge held pressure and did not drop overnight.So do I dare try a third one? If it worked everything seems of good quality and the case is a major plus.

Excelente herramienta