Linda Herbert has created this brush with the artist in mind. This dual ended brush is the perfect tool for applying and blending Marshall's Photo Oils to Marshall's Ink-Jet Canvas and other photographic papers. Both ends are used for applying photo oils right to the surface of the print. Use the larger end of the brush the same way as you would use a cotton swab. I find that you use less oil and you can stay within the lines of your subject with ease. That means less clean up! I still use my cotton swabs for patting down oil color and pulling out the highlights in my image. The other end of the Finelady brush is the very fine detail end. This is the perfect tool for working on portraits and getting precise detail into those hard to get places. I use this end of the brush for applying eye color, catch lights, rim light and eyelashes and brow color.