Can be used with a lip mount or used alone as permanent hole mount. An o-ring is included to seal moisture from migrating under the threaded nut holding the connector in place, but additional water-proofing using silicone is recommended around the connector threads. The PL-259 connector has a reverse threaded barrel. Turn the outer barrel clock-wise and it will thread off the connector body. The coax can then be routed through small holes or pushed through tight spaces without completely removing the connector. After routing the coax into place, screw the barrel back onto the PL-259 connector.