The BlackRapid Lockstar Breathe Carabiner Protector is compatible with BlackRapid straps that feature a CR-3 or CR-4 ConnectR locking carabiner. By folding over a CR-3 or CR-4 ConnectR, the Lockstar Breathe prevents unintentional user contact with a CR-3 or CR-4 ConnectR that could cause it to accidentally unlock. Additionally, it blocks the metal surface of a CR-3 or CR-4 ConnectR from scratching a connected camera. This is a pack of two plastic carabiner protectors.