Clean Cut Paint Edger Roller is a combination of a roller, a shield and a brush working together to quickly paint straight lines along wall edges and trims without masking tape. HERE IS HOW IT WORKS Roller holds enough paint to paint 6-8 feet per load. Fine-Brush paints precisely tothe edge. Shield keeps paint off the trimsand adjacent walls. Reduces The Time Spent Applying Masking Tape. Eliminates most of the getting up and down and moving a ladder. Paints 10-20 times faster than a sash brush.