They absorb most of the accumulated kinetic energy on impact.
GN 254 vibration / shock absorption mounts, also known as shock absorbing mounts, vibration mounts, anti-vibration mounts, vibration bobbins or rubber bumpers, are frequently used as end-stop bumpers, e.. Rubber, Threaded Stud They also act as sound dampers. They act as dampers and prevent damaging shock and rebound.