Dura-Gold Pro Series Adjustable Radius Flex Longboard Hand Sanding File Block, 15-3/4 Long. Uniquely designed hook & loop longboard hand sanding file block with a 2-way design system that allows it to be used with both hook & loop and PSA longboard sandpaper sheets or rolls. Includes an attachable PSA conversion adapter pad with a vinyl face that converts the longboard file block for use with PSA pressure-sensitive adhesive sandpaper sheets. An ergonomic, durable, adjustable flex longboard sanding block that can be set and held at concave or convex shapes. Set your desired angle shape, and then the sanding block will hold that angled shape throughout the sanding process, so you maintain the same contour profile while sanding. The blocks look & loop base has holes to allow for dust-free sanding. Dura-Gold Premium 1500 Grit Green Film PSA Longboard Sandpaper 20 Yard Long Continuous Roll that's 2-3/4 Wide. High-performance longboard sandpaper roll with a PSA pressure-sensitive adhesive backing and an easy-to-peel-off backing liner to protect the adhesive backing. The convenient continuous roll allows you to trim the sandpaper to any length you require. Superior quality longboard sandpaper made with super coated aluminum oxide corundum that's fused with zirconia alumina. It delivers a fast, exceptionally long-lasting sharp cut with a consistent scratch pattern. It has maximum resistance to clogging and loading, increasing your productivity and reducing material consumption. This 1500 grit longboard sandpaper is ideal for use in auto body, paint and detailing shops for extra fine color sanding of paint finishes. It's also excellent to use for woodworking, metalworking, fiberglass, plastics, or any other surface that needs sanding. Material aluminum oxide