The Walter Surface Technologies Zip+ Xtra is designed to cut through steel or stainless steel in heavy duty applications. The cutting wheel features the company's patented rib design to reduce friction on the surface for faster and cooler cutting, and it is 1/16” thick. The Zip+ Xtra is designed with a formulation of zirconium grains that is more durable against the toughest materials, according to the company. The cutting wheel is available in 4-1/2" and 5” diameters.