KD Universal Compression tester Kit 3305 (USA)

This versatile kit provides a quick method to obtain cylinder compression pressure on engines with deep recessed apark plugs and difficult access. | A special air-hold valve is included for easy resetting of the gauge, which is graduated from 10 to 300 psi (0-21 kg/cm2). Gauge assembly includes pressure relief valve. | Do not use with engine running. Intended use only. |