Cut-Off disc contains 3M precision shaped ceramic grain for an exceptionally fast cutting and long lasting disc for use on almost all materials. Cut-Off disc surpass other disc in both performance and longevity, delivering significant gains in productivity. Cut-Off disc to provide an extra sharp, quick cut that lasts much longer than other discs. Cut-Off disc is typically used for cutting through metals, such as auto body or marine sheet metal, stainless steel tubing, exhaust pipes, clamps and rusted fasteners. Disc contain 3M precision shaped grain which forms into triangular points that slice through metal rather than gouging or ploughing like traditional abrasives. Cut-Off disc is attached to a cut-off disc tool (sold separately) and must always be used with a disc guard for safety. Disc must have a maximum operating speed greater than or equal to the maximum speed of the power tool used and must be used with a wheel guard that fits the size of the cut-off disc.