Review on 🛠️ BETOOLL HW0130 Cylinder Compression Gauge for Automotive Engines by Mark Jefferson

For the price it works great, I've only compared it once to the guy that uses the latch and the same results. Does this mean the calibration will fail if I sneeze on it? I just got lucky with "good" I can't say, but that's been my experience so far. UPDATE: from 5 launches to 2. I actually worked on this for 2 months. If I was chasing an engine problem that wasn't there, it would just start testing anything around 50psi. God. just a little imprecise. From reading I got one with a Schrader valve on the end and it's back in business. I would NOT recommend this.