Which DEWALT String Trimmers will the DWO1DT995 QuickLoad work on? Which one does the Spool work on?

The DWO1DT995 QuickLoad Spool is compatible with the following DEWALT Trimmers:

• DCST920
• DCST925
• DCST970
• DCST990
• DCST991

Please see the attached for installation instructions and while this spool comes with .080 line, you can use up to .095 line as long as it is spiral shaped with smooth round edges.