The Sanding Detailer is ideal for finishing those hard to reach areas. The Sanding Detailer is spring loaded to put tension on the abrasive belt. After the abrasive belt is used up the user can simply compress the tool and replace the abrasive belt with a fresh one. They are color coded for easy identification. Standard kit includes one of each of the gray 80 grit, red 120 grit, orange 180 grit and blue 240 grit tool along with 5 replacement belts of each grit.