The Safety Slide Callus Shaver/Rasp is the perfect combination tool for removing calluses and smoothing skin. With its innovative design, this two in one tool employs a unique “slide and lock” mechanism that allows you to safely conceal the shaver portion of the tool when not in use. Great for home and travel. How To Use: Keeping hands away from blade, make sure tool is locked in place. To remove calluses, use on moist skin and gently draw shaver across callus in a shaving motion to remove thin layers of dead skin. To smooth skin using rasp, firmly depress the button on handle and slide shaver down into case, being careful to NOT TOUCH BLADE. (There is a notch on the bottom of the handle for your fingernail to assist in sliding the shaver down into the handle and exposing the rasp). Once tool is locked in place, you can flip the tool and use rasp with back and forth motion to smooth skin.