You need to create a soft body object (wire or cloth) and a constraint before you can use this tool. This tool is usually used with a spring constraint since it changes the constraint position at the second frame. It creates tension and pulls the spring so that it has a sharper effect. This tool also allows you to animate the constraint position.

1. Select the constraint to detach.

2. Click the Detach Constraint tool on the Wires or Cloth tab.