Review on 🚗 Autory Car Spark Plug Tester: Adjustable Dual Holes Detector for 0.433 inches Spark Plug - Ignition Plug Analyzer & More by Patrick Clifton

I've received top marks for the simple fact that they're great for car spark plugs because they're long and reach the bottom of the tester. I was hoping it would also work with short spark plugs like those used in trimmers, chainsaws, etc. But that won't happen. If you're buying this because you're great with cars, but if you're buying this because you want to test short spark plugs like I was hoping, then don't worry.