Pool Tool Company 136-B Tool,Pool Tool,Handrail Stabilizing Plug,Carbon Fiber,1.875"Anchor type handrails are often crushed at the end by the underground anchor causing the handrail to loosen and become unstable. When hammered into the crushed end of the handrail, the Handrail Stabilizing Plug rounds it out and provides a permanent supporting surface for the anchor to tighten against.Space age carbon fiber is stronger than aluminum. They do not break, shatter, or corrode. and will last a lifetime! The plug rounds and strengthens the handrail end so it can be anchored securely.id