Cubitron 3M 33456 II 3" x .04" x 3/8" Cut-Off Wheel - 5 Wheels/Box 3M(TM) Cubitron(TM) II cut-off wheels with precision-shaped grain are engineered to cut faster than competitive ceramic products, offering significant productivity gains Triangular shaped ceramic grain wears evenly, runs cool, and optimizes mineral breakdown, for extra long life Rigid, reinforced resin-bonded wheel slices through almost all automotive materials including mild steel and ultra high strength steel Wheel must have a maximum operating speed greater than or equal to the maximum speed of the power tool used MUST BE USED WITH ANSI-APPROVED FLANGES FOR TYPE 1 CUT-OFF WHEELS AND A WHEEL GUARD THAT FITS THE SIZE OF THE CUT-OFF WHEEL