1High quality brass material, durable and long service life. 2The surface is nickel plated, not easy to break. 3Adopt nut type installation and fixing, easy to install and remove 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