These discs have a harder abrasive than standard flexible-edge quick-change discs.

The premium abrasive stays sharp longer.

A coating prevents dust and debris from building up on the abrasive surface.

These discs have a harder abrasive than standard flap sanding discs.

The backing plate on these discs can be sheared away as the abrasive flaps wear down, allowing you to use more of the disc rather than replacing with a new one.

These discs have a harder abrasive than standard flap sanding discs for corners.

The flaps have an abrasive to remove material and a lubricant that minimizes heat to reduce discoloration of the work surface.

With more flaps than standard discs, these last 30-40% longer.