SEE VIDEO DEMONSTRATION BELOW...Designed for perfectly centered holes in coins when turning ordinary coins into coin rings. For use with 9 piece punch and die set available separately at http://www.CoinRingTools.com. Simply place U.S. coin (Quarter, Half Dollar or large Dollar such as a Morgan) into the appropriately sized hole in the jig. Flip jig and coin upside down while inserting both into the gap in the punch set. Now simply insert the correct hardened steel punch through the top hole of the punch set, and through the hole in the jig. Punch is now resting perfectly on the center of the coin. Coin can now be punched using a hammer or hydraulic press(recommended). Coin and jig can now be removed and coin formed into a ring. Washers will be required to increase the gap size in the punch set to allow for the thickness of the jig (not included). Simply remove the two screws in the punch set, insert an equal amount of washers on each screw in the gap to create room for the new punch jig (simple and only needs to be done once)