Shown are a few of the many abraders and shaft smoothers recovered from the excavations during the 1977 and 1978 Kansas Archeology Training Program field schools at the Tobias site in Rice County. Archeologists call these groundstone tools as they are shaped by grinding. The sandstone abraders could be used as pairs, one on each side, to smooth a wood shaft or individually to sharpen or smooth items. The Tobias site is a Great Bend aspect (ancestral Wichita) village that had dense artifact deposits, house remains, and numerous deep trash-filled storage pits. It is listed in the National Register of Historic Places.