Need a reliable emergency stop for a control panel, machine, or DIY project? This is a compact 16mm mount illuminated push button switch. The big red mushroom head is the international symbol for 'STOP' and is easy to hit in a hurry. It has a 1NO1NC (or sometimes 2NO2NC) contact configuration, giving you both normally open and normally closed contacts for flexible wiring into your safety circuit. It has a built-in 6V LED that lights up (usually when activated), making it visible. It's rated for 5A at up to 220V AC/DC, so it can handle a decent load. The body is plastic with copper contacts. It's an unbranded, generic part (model HBA16-F4R1L), but it's perfect for automotive projects, conveyor controls, or any equipment where you need a simple, effective emergency cutoff. Just press to stop, and typically you twist to reset.