The PowerDyne Y3 Skate Tool includes 3 tools in one!
This versatile skate tool is designed with a 1/2" socket for the truck nuts, a 9/16" socket for the King Pin lock nuts and finally a 15/16" open end wrench for the lock nuts of tampons.
 
The Y3 is a great tool for most frames, and one of, if not the best, for roller skate frames that use a washer and nut system for the tampons (most nylon frames and PowerDyne decks).