Step 1: Determine the center to center measurement between towel bar posts.
Step 2: Transfer this measurement to the top of your level with pencil marks.
Step 3: Determine where you want to place your towel bar. Mark up from the floor 48″ to the center of the first towel bar mounting post. Mark this spot on the wall with a pencil.
Step 5: Using your level, line up the mark on the wall with the first pencil mark on the level.
Step 6: Ensure that the level is in fact level, then transfer the second mark on the level to the wall.
Step 7: Secure the mounting hardware. Center them on the 2 pencil locations on the wall.
Step 8: Attach the mounting posts to the mounting hardware, including the towel bar rail. This may require a flat head screwdriver or Allen wrench.