Farmall Cub

i bought some cultivator shanks today, the also came with , what the man called "fenders",they are upside down "u" shaped part , i think he said they were used on a "m"
any info on these ? and what all tractors will they fit ?,also what are they worth $ ???

Fenders = plant shields. They were mounted next to the growing crop to keep the shovels from throwing too much dirt over the plant and burying it. I would think that they would fit more than one model of cultivator.