The Rubi Tools Stone Cup Wheel 4" (31921) is perfect for buffing work on any type of natural stone， especially granite and marble， and cured concrete surfaces.

Rubi Tools 31921 Stone Cup Wheel Features:

• The orientation of the spiral-shaped diamond segments facilitates the evacuation of debris produced by buffing the material.
• Perfectly compatible with portable electrical grinders and polishers for both wet and dry work.
• High-quality diamond ensures the proper functioning and optimum product performance.