Weiler Wolverine 4.5 inch high density flap discs deliver a fast cut rate and consistent performance at a good value when grinding steel and other metals. The high density flap design is conformable to irregular surfaces while the flat type 27 disc shape is ideal when grinding between 0° - 15°. The 40 grit abrasive grain is best for edge beveling, chamfering, weld grinding, and blending with an angle grinder. Wolverine is an aggressive, get it done product line for everyday general purpose use.