Measure up from the bottom stair tread to the desired height for the handrail to be positioned on the wall using a tape measure. Mark the measurement with a pencil. Do the same from the top stair tread.
Run a chalk line from the bottom pencil mark to the top with the help of another person. Snap the chalk line in the center to transfer the line onto the wall. This line represents the location of the handrail along the wall of the staircase.
Slide a stud finder along the chalk line on the wall. The stud finder will indicate stud locations in the wall. Mark the location of the studs with a pencil.
Position a bracket onto the wall at each pencil mark that indicates a stud along the chalk line. Drive the provided screws through the mounting holes in the brackets into the wall using a screw gun.
Center the handrail on top of the handrail brackets. Drive the provided screws through the holes in the brackets into the bottom of the handrail to secure it in place.