Watch the Around The Bend online guitar lesson by Peppino D'Agostino from Acoustic Poetica: Fingerstyle Etudes
All the bent notes in this etude are done on the 2nd and 1st strings using either the index or the middle finger. It requires strength and precision to execute this etude properly. It's extremely important to pay attention to intonation and to reach the proper pitch as you bend these notes.
You'll see in the video that the notes are either bent in an upward or downward motion. It's important to choose one or the other in order to simultaneously play the proper bass notes. On measure 6 for instance, if you bend the note A# (11th fret, 2nd string) upward you won't be able to play at the G note at the same time (3rd string open).