The peeling machine only applies to sunflower seeds, if the sunflower seeds you put in get stuck and don't come out, you need to change to a bigger hole and try again, if the sunflower seeds you put in come out and don't shell, you need to change to a smaller hole and try again, if it doesn't shell or get stuck when placed in the smallest hole, the sunflower seeds are too small and need to be replaced with larger sunflower seeds.