Callus Performance® is designed by athletes for athletes! We have ensured that its design will prevent the tearing of your hand by strengthening the callus area so you can continue your regular workout routine. Callus Performance® works in two simple ways: by trimming and shaving calluses. This will level the calluses with the rest of your hands by carefully removing excess skin. Most callosite products on the market are very aggressive and weaken the living skin around the callus. Instead, Callus Performance® reduces most callosities and strengthens the area more effectively to prevent it from tearing again.