In this day and age, everything is made in factories... including weapons. But before the dawn of technology, everything was made by hand. Named after the stone that made it famous, Flint Ridge State Memorial Park held a "Flint Knap-In." The event teaches people how to make arrowheads using the old fashiond knapping process. Deer antlers and copper are tools used to knap flint. Grinding is also used to properly complete the traditional method. Some feel knapping may be the oldest profession known.