17" LongBig Hoof Rasp32171 The Heller Big Hoof 17" hoof rasp is one of our top selling horse rasps.This Big Hoof Farrier File is a favorite hoof rasp among farriers.Large enough for a draft horse, but workable as any 14" hoof rasp,with consistent quality. Formerly Simonds, now Heller Rasps byMustad, this is used by barefoot hoof trim practioners as well.