Fibral Abrasive Wool is more flexible and easier on your hands than steel wool. Since it won't leave rusty spots to mar your work, you can use it wet or dry. The Sample Pack contains one pad each in coarse, medium and fine grades, color-coded so that you won't have to guess what you just grabbed. Individual grades come in handy perforated corner boxes so that you can tear off exactly what you need. Triangular boxes are 12" x 10".