An assortment of square keys from The Hillman Group. Square keys are small bars of any length with similar height & width. They are inserted between a shaft and a hub to prevent relative rotation. Variants included in this assortment range from 1/8" to 1/4" in diameter and come in lengths of 3" & 6". Full assortments of #45966 contain seven (7) refills comprised of Hillman item numbers #45967 - #45969 and #409011 - #409013. Full assortment features two (2) refill boxes of item #409013.