This allen wrench has a special hole to accept the pin in the shackle bolt head. This will fit both the shackles and shackle pendulum swing hangers. Vandal proof hardware is made easy with this tool.
AAA State of Play How To: D-Shackle(1:6)
Installing swing seats and chain can be a very simple process by using D-Shackles. Our commercial grade swingset accessories provide lasting results for swing needs.