This is a brass knuckle-shaped key ring from UNDER GROUND METAL FACTORY. I believe I purchased it about 5 or 6 years ago. I used it for about a year, attaching it to my bag and jeans. Therefore, there may be some minor scratches, but it should be fine for use. I believe the material is brass. Please check the images for the product size. Please refrain from purchasing if you are sensitive to used items. Instant purchase is OK. Thank you. No stains, tears, or odors.