It hooks naturally to your camera with any of the exisitng BlackRapid FastenR options. The included BlackRapid FR-5 FastenR Breathe features a large, integrated D-ring for easy use with BlackRapid straps that utilize a CR-3 ConnectR locking carabiner. Perfect for users that like to shoot without a sling strap or hand strap and want a tether to prevent dropping the camera.