I have a brand new chainring set for an Easton gravel bike crankset. To the best of my knowledge, these will only fit the Easton cranksets, I don't think they are compatible with other brands. They have never been used and are still sealed in the manufacturers packaging. Compare at $155 plus tax and shipping from Easton or Jenson. If your driveline is getting worn or you have bent a chainring, this is great way to save money on a replacement. Note that chainrings in the bag are the new chainrings that are for sale. The photo of the chainrings on the bike are just to illustrate what they look like when mounted with the arms.
Full specs are available on the Easton website: https://eastoncycling.com/products/gravel-shifting-rings?srsltid=AfmBOoojfKDxoP4FEl5qg0IAxV1pOIRL3kjdswbn60e7RIrVXhLFC7vO