The 2002 United States Proof Set includes a collection of coins that have been struck using a high-quality minting process, resulting in a mirror-like finish. This set features the five state quarters released in 2002: Ohio, Louisiana, Indiana, Mississippi, and Pennsylvania, along with the Kennedy half dollar, Roosevelt dime, Jefferson nickel, and Lincoln penny. Proof coins are produced in limited quantities, making them highly sought after by collectors for their quality and aesthetic appeal. The 25-cent coins from this set exemplify the unique designs representing each state, enhancing their collectible value.