This Eclipse Back to Back Fixing Kit is to be used with the Eclipse Guardsman pull handles. If you wish to use these handles on both sides of the door, then back to back fixings are required in order to attach them both. The back to back fixing kit is suitable for glass or standard doors up to 55mm thick. The Guardsman handles are sold in pairs, but if you are ordering a pair of back to back handles please ensure you order 2 pull handles & one fixing kit per door.