Features: The Spyder Diamond Edge universal cut-off wheel features a diamond abrasive edge, combined with a shatter-resistant steel core. Together, these ensure safe operation, reduced dust and debris and a much longer working life than typical wheels - up to 100x more cuts. For use on most materials including steel, stainless steel, cast iron, rebar, masonry, ceramic tile, composites, and more. Diamond abrasive lasts up to 100x longer than conventional bonded abrasive wheels Cuts almost any material - steel, stainless steel, cast iron, rebar, stone, concrete block, brick, ceramic tile, composites and more Safer, shatter-resistant wheel won't blow apart like conventional bonded abrasive wheels 100x longer life diamond abrasive wheel when compared to conventional bonded abrasive wheels Wheel remains 7-in diameter for a consistent cut - won't shrink in diameter like conventional bonded abrasive wheels Lowest cost per cut - spend less time replacing wheels and more time working Reduced dust and debris during use For use on angle grinders with a 7/8-in arbor and a maximum RPM of 8,400 Includes a 5/8-in bushing for use on circular saw