• Screen Sheet,Screen Sheets • Save money by sanding, cleaning, detailing, and finishing with the reusable Screen-Bak Durite Q421 medium grit screen sheet. The sheets feature a washable and waterproof construction and come packaged in a protective dispenser for easy storage. The open weave screen resists loading when removing scale, rust and corrosion, while the P-graded silicon carbide gives you excellent cutting on light-to-moderate material removal applications on hard and soft woods, soft and hard carbon steels, stainless steels, fiberglass, composites, and metals. • P-graded silicon carbide for excellent cutting and non-loading properties • Open weave screen for extreme resistance to loading when removing scale, rust and corrosion • Waterproof and washable; screen sheets are packaged in a protective, convenient dispenser which eliminates costly waste and permits neat, easy storage • A good choice to rinse and reuse for light-to-moderate material removal • 100-150 grit recommended for light deburring and cleaning