Safe-Guard Medicated Dewormer Block, 25 Lbs. is a medicated, soft-poured molasses block which contains Safe-Guard (fenbendazole) for effective broad spectrum deworming. Easy to feed and highly palatable. One 25lb. Block deworms 16 head of 500lb. Cattle. For the removal and control of: Lungworms; Stomach Worms: Barber pole worms, Brown stomach worms, Small stomach worms; Intestinal Worms: Hookworms, Thread-necked intestinal worms, Small intestinal worms; Bankrupt worms; Nodular worms.