The Construction tools section of the Tool palette includes the Grid tool, the Link and Unlink tools and the Attach and Detach tools.
The Grid tool lets you customize the grids that appear in the Modeling window. The Link and Unlink tools let you establish a link between objects in your model, using a parent/child relationship. This means that you can make changes in the scale, location and motion of the parent object, and have the changes carry over to any child object that is linked to the parent.
The Attach and Detach tools are for use only with Strata 3Dpro tools such as Bones, the Inverse Kinematics tool.