When used as directed, Virucidal Anti-Bacterial H-42 Clean Clippers will prevent the growth and transfer of bacteria from one cutting to the next, and will keep your instruments in very good working order. Virucidal Anti-Bacterial H-42 Clean Clippers will not cause rust or corrode your expensive tools, or harmful vapors that will endanger your health. The only blade disinfectant with a Federal Patent, most H42 products are EPA registered and approved. Accepted by the National Assoc. of Barber Boards of America.