Smooth (Corn/Callus Shaver)First, go for the rough stuff. Use the corn/callus shaver to smooth down any exceptionally tough corns and calluses. Applying gentle pressure, draw the razor across the corn or callus to shave off thin layers of dead skin. Over time, the blades for the corn/callus shaver will get dull from regular use - after which, you will have to replace the blades. However, before replacing, please note that each laminated razor blade is two-sided so that you can turn the blade around and use the other edge before changing to a different blade. Buff (3-Sided Foot Rasp)After treatment with the callus shaver, go for the finer details with the foot rasp. This rasp is specially designed with a dual abrasive surface that is effective in smoothing out rough spots on the heel and back of the feet. The rasp also has an exfoliating sander on the third side for gentle exfoliation. To use, work the rasp back and forth in a smooth filing motion. For best results, finish off your foot care regimen with a soothing dose of our famous Earth Therapeutics Foot Repair Balm. To comfort, replenish and revive worn and tired feet, make sure to massage in the emollient-rich Tea Tree Oil Foot Repair Balm - focusing especially on the acupressure points along the sole.