The 3M rigid grinding discs are 6mm thick depressed center disc for right angle tools and are designed  to provide high rate of stock removal and long life to meet all your toughest grinding needs.
Application:
Suitable for all metal stock removal and heavy duty grinding operations. Typical applications include weld removal, flame-cut grinding, flash, gate and riser removal.
Industry:

•  Recommended for use in shipbuilding, maintenance and construction, metal fabrication, general metalworking, and automotive manufacturing.
• Always use properly guarded tools, follow maximum operating speed recommendation and wear proper face and body protection.

Safety First!
Available in 4”, 5″, 7”