Backing Pad, 11,000 rpm, 4 1/2 in x 5/8 in - 11, Medium

Features: Design allows air to flow through the slotted hub and between the spirals on the face of the pad, keeping the disc cool | Constructed to keep the disc cool, therefore extending the life of the coated abrasive disc | Ideal for all sanding operations on metal, plastic fiberglass, etc | Each pad is made individually in a single mold, then tested for perfection