Crafted with a sharp zirconia alumina abrasive, the Merit ZA coarse grit center mount fiberglass heavy duty conical flap disc is a great choice for last-minute projects that demand speedy stock removal. This quality disc offers an excellent cut rate to ensure high productivity, and angled polyester and cotton flaps enhance surface contact, making this disc an efficient option for blending and beveling tasks on contoured surfaces and edges. Fiberglass and resin backing plates provide strength and absorb vibration to help reduce user fatigue.