Glenoid bone loss is a risk factor for recurrent glenohumeral instability. Various techniques exist for glenoid bone graft augmentation, mostly relying on metallic hardware fixation. However, few data are available on traumatic instability with bipolar bone loss. We describe an all-arthroscopic double-bone block cerclage technique, using 2 tricortical iliac crest autografts, for bidirectional traumatic glenohumeral instability with bipolar glenoid bone loss.