An assortment of large external and internal retaining rings from Hillman. Retaining rings are used to secure parts onto shafts. They fit into grooves in the shaft for a snug fit. Internal rings in this assortment run 3/4" thru 1-3/4" in diameter while the included external rings run 7/8" thru 1-3/4" in diameter. Full assortments of #2183 contain thirteen (13) refills comprised of Hillman item numbers #2184 - #2196.