An accentuating coupler, also known as an actuating coupler, was a piece of technology that was mounted on legs of R2-series astromech droids such as R2-RN8W, and R3-series astromech droids such as R3-B0017.
- Star Wars: The Force Awakens: The Visual Dictionary
- Star Wars: Build Your Own R2-D2 1
- Star Wars: The Complete Visual Dictionary, New Edition