The Spiral Bands are small, round tubes of abrasives, coated with aluminum oxide or zirconia grains. This tube-shaped spiral band fits inner and outer contours to remove parting lines, imperfections, and burrs. The aluminum oxide abrasive mineral cuts fast and performs well on many substrates. They are perfect for finishing curved or shaped areas and other hard-to-reach places and ideal for grinding in small areas. Each spiral band can fit onto a rubber expander wheel attachment for use with a die grinder or rotary drill. It can be used in a wide variety of applications like woodworking and metalworking including ferrous metals.