EUCHNER EGT Single Hole Fixing Limit Switches are technically sophisticated control switches that have held up for decades in harsh industrial applications and are entirely maintenance free. Their cylindrical design enabling direct mounting inside a smooth or threaded hole. This allows the switching point to be easily and accurately adjusted, and eliminates the need for additional mechanical components like levers and linkages to actuate the switch. There are six different styles to choose from, depending on your application.