The rubber plate fit exactly on Heber plate with 150mm diameter. My jack have smaller diameters, but the rubber plates are stable enough that you can use them too. Soald the rubber is loaded, they are tight with respect to Heber and upscale object. The holding forces generated by the rubber are very good and also the protection of upscale items to scratches and other injuries is very good. Since the lifting of a floor jack course always runs in arc shape, arise - particularly on not quite level ground side forces that must be absorbed to such an extent that the jack does not slip under the car. This is with the rubber plates met, even with some rougher ground as older asphalt or older a bit washed-out concrete, where the Rangierheber reluctant rolls. Those things are worth the money and the price is also ok!
