Automatic Locking Retractors allow the safety belt to be pulled in one motion until fastened, then operates as a ratchet, thus preventing further extension. On most safety belts you will hear a faint clicking sound that indicates the belt is locked and ratcheting in. The Automatic Locking Retractors on belts help to keep the occupants in place in the event of a frontal collision or during hard braking.
ALR – Automatic Locking Retractors
