Circle clips, or C-clips, are semi-flexible metal rings with open ends which can be snapped into place. C-clips fit into a machined groove on a dowel pin or other parts that permit rotation but prevent lateral movement. Variants included in this assortment range from 3/4" to 2" in diameter. Full assortments of #43391 contain eleven (11) refills comprised of Hillman item numbers #43392 - #43402.