High quality metal material and IP65 waterproof protection can be used in humid or dusty environment. Push button hole diameter: 12mm, push button hole thread: 0.75mm. Metal shell, 100% brand new and high quality, mechanical life of 500,000 cycles The push button is a momentary or non-latching switch that causes a temporary change in the state of an electrical circuit only when the switch is physically actuated. An automatic mechanism (such as a spring) returns the switch to its default position immediately afterwards, thereby restoring the original circuit state. Can be used as a push button for various additional electrical equipment, indoors and outside the car (critical lights, chassis lamp, fog lights, dome light, etc). Customer satisfaction is our greatest pursuit, if you find our products not working or the quality is not as good as you think, please contact us without hesitation.