3M™ Cubitron™ 3 1169F flap disc 3M™ The 3M™ Cubitron™ 3 1169F flap disc is a high-performance abrasive engineered for heavy-duty grinding, deburring, and metal surface preparation. Featuring precision-shaped ceramic grain, it delivers fast material removal with extended service life and consistent cutting action. Ideal for carbon steel, stainless steel, and alloys, it is perfectly suited for industrial applications including metal fabrication, structural steel work, welding preparation, and industrial maintenance. Learn more