3M ™ Cubitron ™ II flap discs are designed for grinding and fine-tuning; in one step they do more work at the same time. Exceptional 3M ™ fine grit ceramic grains. 3M ™ Cubitron ™ II flap discs are faster and require less pressure to help reduce operator stress in heavy operations, including grinding, weld removal, deburring, and more.