These are a slightly more modern take on the vintage styled Telecaster output jacks which were just a push in fit. These come with two screws that are inserted into the two holes on the inside of the jack to hold it secure (screws supplied).
These jack plates have a threaded section in the middle for your output jack sockets to screw into. This is import sized and will not fit switchcraft jacks. Suitable jacks can be found in our store.
Width (at point that is inserted into guitar) - 22mm
Width (at lip that is not inserted into guitar) - 26mm