Cimex Horseshoe Weight (35 lb) for the CIMEX CR48DF "Diamond Finisher" model.
The 35 pound weight adds pressure for Marble, Stone, and Concrete Grinding and Polishing. And they can be stacked in multiples (up to 3 weights per machine).
Cimex part # 17818. Adds extra weight for increased power of marble grinding, stone grinding, or concrete grinding and polishing.