Inertia plays a central role in one seat-belt mechanism. The gray
Newton's First Law of Motion
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Should I wear a seat belt while driving? - Quora
Front Seat Belt 3 Point Inertia with Chrome Buckle and Grey Webbing: 111-857-691/C/GRY
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Figure . Head, shoulder and knee sagittal trajectories for PMHS and
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Our 1964-75 GM lap and shoulder belt kit includes everything you will need to add a retractable belt system to your classic Chevrolet Pontiac,
1964-73 Chevrolet Chevelle Shoulder Belt Kit with Aviation Style Buckles