This picture shows a large variety of different types of end-scrapers. The most common examples are unifacial scrapers made from flakes. They have been found in a wide range of sizes and they were being produced beginning with early Paleo through to the Mississippian periods. End-scrapers made from broken projectile points are the rarest form. The largest unifacial scraper in this picture (in the center) measures 3 3/8 inches (8.5 cm) long.