The work horse of our line always gives you the results you require. Light-weight cushioned construction gives just the right amount of feedback when sanding. 3/4” (20mm) Professional Hobby Sanding Files give you plenty of feedback that prevents excessive material loss. The key to great results is using the proper progression of grits. Always work from coarse to fine in order to remove any scratches, dents, or imperfections. These files are light-weight, waterproof, washable, and reusable making this product a must have.