These four drills are just a few of those recovered from the 1993 Kansas Archeology Training Program field school at the Sharps Creek site, a Great Bend aspect (ancestral Wichita) village in McPherson County. Drills were used to bore holes in softer materials than the drill itself, such as hides, shell, wood, or soft stone. The two drills on the left are made of Smoky Hill silicified chalk, a type of chert that outcrops in western Kansas and Nebraska. The two drills on the right are of an unknown material.