1Adopt nut type installation and fixing, easy to install and remove 2Use nylon base, it is safe and reliable to use. 3High quality brass nickel-plated material, beautiful and bright surface and comfortable touching. 4Suitable for automobile modification, engineering instrumentation, battery car modification, access control switch, home appliance button, host modification, etc. 5Available in four styles for choice: Red 12V, Green 12V, Red 24V, Green 24V