Image is Representational - See Manufacturer Specs | MICRO SWITCH Heavy-Duty Limit Switches: LS Series HDLS Limit Switch Side Rotary Momentary Plug-in 1NC 1NO Single Pole Double Throw (SPDT) Snap Action Double Break Fixed Length Lever with Front Mounted Nylon Roller 0.5 in - 14NPT Conduit Limit Switches are generally used to control machinery in industrial applications. They act as a safety interlock and can be used to establish or disrupt electrical connections. These limit switches are generally used in machine tools material handling packaging equipment presses pulp and paper welding and PLC interface among others. LSA1A-1A Limit Switch from Honeywell is a heavy-duty limit switch. This Honeywell Switch is available with a choice of circuitry and electrical