# Prerequisites

Anyone interested in learning more about the STRwrench web user interface can benefit from reading this user guide.

For a complete understanding of the technical aspects in the user guide the following is recommended:

- Knowledge about tightening techniques

- Experience of working with Power Focus 6000 or Power Focus 4000

For more information about Power Focus 6000 and Power Focus 4000, refer to the Power Focus 6000 User Guide and the Power Focus 4000 User Guide.