Description Reviews EcoJarz Graters are a set of two stainless steel graters that fit wide-mouth mason jars. The set is comprised of one large-tooth grater lid, and one medium-tooth grater lid. Attach either one to the top of a canning jar with a regular jar band and grate cheese or veggies directly into your jar. Perfect for jar enthusiasts, simple living, and for use on-the-go. Made entirely of 18-8 food grade 304 stainless steel.