@tomislav - They do make such a product! My husband uses a something that is in the shape of an egg, but I am not sure of the name. I personally do not think that it works well enough on my calluses, but sadly I think my calluses are actually worse than my husbands so I think the egg looking rasp works just great for him.
I have been looking and there are more callus rasps that have traps to contain and catch your skin as it is removed. I do not know yet if they work better than the other plain rasps, but I am going to go into one of those large beauty stores to see if they can point me in the right direction.