I have a strange question: my bathroom has a TP holder that is supposed to hold the paper without the bar. The 2 pieces secured to the wall have a circular bump that is supposed to hold the TP in place. Unfortunately, the standard width of toilet paper has changed since this was installed so the TP does not stay in place. There is a round plastic piece that bumps out on the arm pieces so it will not accept a standard TP holder bar. Any suggestions? I apologize in advance for not using the right words for the pieces...not sure what they are called officially called.