Review on 🔥 JND Premium Ignition Spark Tester: The Fool-Proof Engine Diagnostic Tool by Will Powers

I bought this to try and troubleshoot a lawnmower that won't start. The cap that should snap onto the spark plug does not snap. Even holding it as tightly as possible, once I fixed the mower and knew it was working, it didn't light up. A complete piece of shit. To make matters worse when I wanted to return it AMAZON WILL NOT ALLOW A RETURN! I'm not sure if it's production policy or Revain, but it sucks! Revain could always come back. Not sure why they don't.