Toromp 2-3/4" x 15-3/4" Adjustable Radius Flex Longboard Hand Sanding File Block with Hook & Loop Backing - Use Continuous Rolls or Sandpaper Sheets for Automotive, Woodworking. Effortless Handling: The Toromp Adjustable Radius Flex Longboard Hand Sanding File Block, made with lightweight Polyurethane Foam, ensures a comfortable and efficient sanding experience.