3” x 4” Interface Backup Pad – Hook & LoopAvailable in Soft Density & Hard Density Protect your profiles. Improve your finish. These 3x4 Hook & Loop Interface Backup Pads are designed to be used between your sander and sanding sheets like FILMTEK, slightly raising the sander above the surface. This added cushion helps prevent flat spots and profile damage—especially when sanding cabinet doors and detailed woodwork. Soft Density Interface Pad The soft density pad provides extra cushioning and flexibility, making it ideal for: Sanding center panels without damaging surrounding profiles Moldings and deep profiles Detailed trim work Removing knife marks from cutting tools on raw wood It conforms to contours while still maintaining control—perfect for delicate or detailed surfaces. Hard Density Interface Pad The hard density pad offers a firmer feel with less compression, making it ideal for: Sanding raw wood panels Flat cabinet door center panels Other raw wood surfaces that require a more consistent, even sanding surface It still provides lift to protect profiles but maintains a more rigid sanding platform. While we recommend EKASILK PLUS sponges during the finishing process, these interface pads are the perfect solution for sanding raw wood, detailed panels, and protecting profiles during prep work. Choose the density that fits your application—and sand with confidence.