Portable Grab Bars

You must be kidding. The grab bars for handicap access must securely attached to wall studs. Potentially they need to be able to withstand the weight of an adult who can take to prevent a fall.

Home Depot sells the appropriate style.

You can not be serious, my mother has ALS, they are anchored securely to the wall or they may detach. If you do not need them more than the holes in the putty and repaint.