Here is a picture of an aboriginal "bopper," or percussion instrument that primitive man could have used to make stone tools and weapons. I constructed this tool by using the fork of an elk antler to hold a hammerstone. Then I hafted the stone in place using deer rawhide. I soaked the rawhide lace in water until it was soft and pliable, then wrapped the stone in place in the elk horn fork. When the rawhide dried it shrank, making a very tight and secure binding for the stone tool. This tool would be used to strike flakes off the edge of flint rock. The flakes were used for scrapers or arrowheads and the main body of the stone would be a sharp-edged axe, hoe, adze or tomahawk.