Review on Tool Aid 34000 Universal Compression by Robert Rick

Purchased to replace my old Mac Tools compression tester. With this design, thin hoses are separated by hoses, which is necessary for compact engine compartments or deep cavities. Sufficient adapters are supplied to mate with most types of threads and spark plug seats. The maximum pressure of 300psi is suitable for low compression diesel engines. The price was competitive with other unnamed brands and good quality.