Constructed of neoprene rubber using an aluminum hub with 5/8" smooth bore; no threads, fits more tools|Design allows air to flow through the slotted hub and between the spirals on the face of the pad, keeping the disc cool|Helps extend 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
