Buckle      Active Seatbelts   Belt Grabber   Belt-in-Seat   Buckle   Height Adjuster   Load Limiter   Pretensioners   Retractor   Smart Belt   Trunk Belt A seatbelt buckle must be able to withstand extremely high loads during a crash. At the same time, it must be easy to open even when heavily loaded (if, for instance, a person is left hanging upside down in the belt). Autoliv has developed a unique, patented buckle, which is designed to withstand high accelerations in all direction without opening, which is critical when the seatbelt system includes a pyrotechnic pretensioner. This device pulls rapidly the buckle towards the floor to tighten the belt during a crash.