THE MOST AMAZING LASAGNA is truly the world's best lasagna. Absolute perfection! And the hack for the pasta is genius! RECIPE:...
Shower head parts called escutcheons or flanges are situated over the area of the arm as it fits into the wall. The escutcheon is largely decorative and serves to hide the opening made by the shower arm.
Remove the cap, slide an escutcheon along the arm and secure it against the wall by tightening its hex screw against the shower arm with a hex wrench. Finish the job by screwing on the shower head, which you should be able to tighten by hand.