Measure down 2 1/2 inches from the top end of the kneewall with the tape measure. Make a mark with the pencil. Repeat this step on the other end of the wall.
Run a chalk line between both marks. Pull tight and then snap the chalk line to put a straight line on the wall.
Locate the studs in the kneewall using the stud finder. Mark the location of each stud with the pencil.
Place a bracket for the hand rail on the chalk line at the location of a stud. Mark the mounting holes on the wall. Drill pilot holes in the wall with the power drill. Repeat this step for the other brackets.
Align the bracket-mounting holes with the pilot holes drilled into the wall. Secure the brackets onto the wall with screws. Place the hand rail on top of the brackets.
Drill pilot holes into the bottom of the hand rail. Secure the hand rail to the brackets with screws.