3M™ Cubitron™ II Abrasive Belt 947A is made with revolutionary 3M Precision Shaped Grain technology on an X-weight, water-resistant polyester cloth backing. It is resin-bonded for heat resistance and can be used wet or dry. 3M™ Cubitron™ II Abrasive Belts feature a grinding aid which enhances performance and an X-weight backing that excels in low/medium pressure stainless, mild steel, and aluminum applications 3M™ Cubitron™ II Belts not only last up to four times longer than conventional ceramic abrasive belts, but also cut faster throughout their life. This translates to more finished parts per belt per hour. The precision-shaped grain found in Cubitron II belts combines the advanced material properties of our original Cubitron grain with the precise microreplicated structures pioneered in 3M™ Trizact™ Abrasives. As the triangular shaped grain wears, it continuously fractures to form sharp points and edges.