The socket has holes to install the set screws to prevent them from rotating. Size: The inner diameter is about 1 inch (25.5 mm), making it an ideal workaround for lighter sheers or heavier curtains.< /p> Easy to install: Just select the installation location, screw in one of the brackets, then place the pipe and connect the other bracket. Application: Fit between two brackets on the ceiling or wall to install interior curtains.It can also be used in closets, bathrooms, windows, laundry rooms and other additional storage bars, towels, clothes, ties, etc. Il peut galement tre utilis dans les placards, salles de bains, fentres, buanderies et autres barres de rangement supplmentaires, serviettes, vtements, cravates, etc.