The ZLB KR50/1 COM and NO 2 Pins Micro Limit Switch Normally Open is a small and versatile switch that can be used in a variety of applications. It has a COM and NO 2 pins design that allows for easy installation and use. The micro size of the switch means that it can be used in tight spaces where larger switches cannot fit. The Normally Open feature means that the circuit is open until the switch is activated, making it ideal for applications that require safety or control. This switch is perfect for use in machinery, robotics, and other industrial applications.