Used to fill pincushions, this naturally abrasive black walnut shell grit sharpens needles and pins as they're stored! One 8 oz bag will fill several small pincushions, or one large pincushion. Unique, hard-to-find item that makes a great gift.
For an example of how easy it is to make a black walnut pincushion, check out this tuturial, one of many you can find if you search "walnut shell pincushion" on your favorite search engine.