Engineered to slice through sheet metal, aluminum, and high-strength steel quickly and with less technician effort 40% more life and cooler operation than our previous generation of Cubitron™ II Cut-Off Wheels Long lasting performance High cut rate - remove up to 40% more material than 3M™ Cubitron™ II Cut-Off Wheels Improved balance and smoother action while delivering higher performance than previous Cubitron™ II Cut-Off Wheels These Cut-off Wheels are built with the 3M Cubitron 3 Precision Shaped Grains designed with sharp, angular structures that continuously fracture to form fresh, sharp points that allow the discs to slice faster, and last longer .