TORR mounts plate is an element of shock absorber, that is composed from rubber pad to extinguish shock and vibration, as well as metal oil seal, that minimizes friction during rod's movement.
It is important to keep in mind that any cracks in strut mounts inevitably occur during operation of the vehicle. Temperature changes and dirt significantly accelerate the process of strut mounts wear. It is very easy to find a broken strut mounts - when the car's wheel passes any small cavity you will hear dull tapping. Malfunctioning strut mounts needs to be replaces immediately. In case of its breakage, vehicle operation is unsafe.
TORR strut mounts - main design features and competitive advantages: