9" backing plate for bolt on mini diamond grinding discs, such as DG-H5. Compatible with PD23 Diamond Floor Grinder machine. 

Features:

• Magnetic backing disc 
• Size of backing plate: 230mm (9")
• For use with metal dot and resin discs only (not metal Segments)
• Quick change backing disc for the PD23 9" diamond floor grinder. Includes 3 magnetic segments to attach a range of metal dot and resin puck mini diamond polishing discs