3M Cubitron II Roloc Disc 984F, 36+ YF-weight, TR, 4 in, Die R400BB,25/Carton

This generates a super-fast cut and lessens heat build-up due to friction, reducing heat-related stress cracks and discoloration. Backing Weight YF Weight. Manufacturer: 3M. Disc life is significantly longer, completing more parts per disc and requiring fewer disc changes compared to conventional abrasives.