Review on Twidec Waterproof Momentary Modification Assurance Industrial Electrical by Matt Heringer

This push button switch is EXACTLY as described. It's small which is what I needed. It installed easily and exactly as I expected. It will fit a 1/2" or 12mm diameter hole. It is designed as part of an electrical device, likely smaller than a motor vehicle. If you are buying for a motor vehicle you will likely be disappointed. Buy something larger.