Neolithic Tools from Lakes in Switzerland These highly specialized tools include arrow points, awls, chisels, scrapers, stone ax blades in antler sockets, sickle blades, and round spindle whorls, designed to twist fibers into thread. The people who made and used them lived in wooden houses on stilts over the water, and the mud of the lake bed preserved even the bone and antler. (Courtesy of Peter A. Bostrom)