Arbor Size: 5/8 in.-11 | Brand Name: DEWALT | Diameter: 4 1/2 in. | Material: Rubber | Maximum Speed: 12000 rpm | Number in Package: 1 pc. | Usage: For use with fiber discs Crafted from high-quality raw materials for consistent performance, DeWalt fiber disc backing pads feature spiral vents to keep discs cool and helps to increase life. Designed as backing for fiber resin discs. | Ensures proper finishing, sanding and waxing | Integrated with arbor thread mounts directly on shaft grinder | A crucial component for attaching sanding discs, foam bonnets and polishing bonnets