Josh Bridges says - " Thanks to Callus Performance! This little bad boy is great for cleaning up those hands! And it's made in the good ole USA! " Callus Performance is designed by athletes for athletes, we have assured its design will prevent the ripping of your hand by strengthening the callus area in order to be able to continue your regular workout routine. Callus Performance® works in two easy ways: by trimming and by shaving the calluses; this will level the calluses with the rest of your hands by carefully removing excess skin. Most of the callus treating products in the market are very aggressive and weaken the live skin around the callus, instead, Callus Performance® trims most of the callus and strengthens the area in a more efficient way in order to prevent it from ripping again.