- Measures cylinder compression to accurately diagnose engine condition
- Compatible with most standard spark plug threads
- Quick disconnect coupler separates hose from gauge for faster, easier connections to the engine
- Push button side release valve allows repeated testing without disconnecting
- Includes adapters for most standard spark plug threads: 10mm,12mm, 14mm, 4mm long reach, 18mm
- Repair kit includes valves and rubber O-rings
- Easy-to-read, 2-1/2" professional gauge
- Bourdon tube movement for accurate readings
- Heavy-duty rubber boot protects gauge
- Standard and metric scales: 0-300 lbs psi and 0-2100 kPa
- Tool pouch keeps parts organized
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