Made for the 21st century machinists – washing their hands all the time, there is no place for grit. Soap that contains abrasives generally breaks the smoothness of the skin. When your hands are then exposed to certain fluids, such as metalworking fluid (MWF), your skin generally becomes more irritated and encourages certain skin problems, such as dermatitis. Sandpaper-like soaps were formulated over 100 years ago and like tooling today the technology has improved over time.