The mounting system is a huge plastic nut the threads around the entire gauge on the back side and make it difficult to mount in some areas of the dash. Might be okay on the under dash triple hole plate but where access is limited it is almost impossible to turn the mount nuts tight enough. My gauges spin a bit because I cannot tighten them enough.

https://www.amazon.com/Equus-8200-Volt-Triple-Gauge/dp/B000EVWEKO