Our Hookit™ Clean Sanding Disc Pad Kit features a durable foam Hookit™ disc back-up pad with 5/16-24 internal threads, and includes five adapters so the pad can be quickly and easily attached to different tools. The disc pad also features our multi-hole Clean Sanding pattern for superior dust extraction, ready for use with Clean Sanding discs on random orbital and central-vacuum-ready sanders.