Smirdex Velcro RollA Velcro roll in sanding terms refers to abrasive paper or mesh on a roll with a hook and loop (Velcro) backing, so you can cut it to length and attach it easily to compatible sanding tools (e. g., sanding pads, speed files, or orbital sanders). These rolls come in different widths and grit sizes (e. g., P80 to P400), and are used for sanding wood, paint, primer, composites and more.