SandBar Foot File Kit | Durable and Strong | Completely Waterproof. Use in Shower to Exfoliate Hard, Dry Heels. | Ditch the Scraper for a Less Invasive Treatment! ULTIMATE CALLUS MANAGEMENT: Calluses are important, but too much build up is the enemy. With SandBar, you can keep on top of rough, hard skin buildup. Remember to sand down calluses regularly for best results!TRAIN LONGER, STRONGER: SandBar ensures that with proper and regular use, your hands will be smooth and enable you to keep on training without bloody and painful torn skin that decrease performance.FUNCTIonAL FOR EVERYDAY: No matter what you are using your hands for, SandBar was created with hard working people in mind. We found the best materials, and molded the best tool for hands everywhere. SandBar is eight inches long, one inch in diameter, and easily fits into any gym bag or backpack.INVEST IN YOUR TRAINING: You are taking time to build up your quads, increase your lung capacity and reach new heights- and conditioning your palms is just as important! Invest in your workouts by making sure your palms and fingers are ready for whatever hell you're going to put them through next. Trust us, it's worth it.