This listing is for One Flat Hollow Ground Coin Ring Center Punch. This Flat Hollow Ground Punch (FHGP) gives you a sharper inward tapered cutting edge of about 10-15 degrees all the way around the punch. The FHGP strikes the coin evenly and prevents the coin from trying to push away from the punch that can cause the coin and hole to get slightly egg shaped and off center.
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