Hold the shorter of the two handrails perpendicular to the face of the corner newel post and slip the hole in the end of the handrail over the hanger bolt. Remember that the corner newel post has hanger bolts installed in two adjacent faces, so be sure to install the short handrail in the correct hole.
Insert a spring washer over the end of the hanger bolt through the larger hole on the bottom of the rail. One surface of the washer is convex while the other is flat. The convex surface butts against the curved wooden interior of the hole.
Locate a combination nut/washer in the components that came with the railing system. The flat side of the combination nut/washer will fit against the flat side of the spring washer you just installed.
Put the washer into the special wrench that comes with the railing system and insert the tool through the large hole in the bottom of the handrail to place the combination nut/washer on the bolt. Tighten it against the spring washer to secure the hanger bolt.
