Dowel Screws often feature either wood screw thread on both ends or machine screw thread on one end with wood screw thread on the other. The center of the screw is left unthreaded so that the screw can be easily tightened with pliers. Parts often found in furniture applications. This assortment features dowel screws ranging 3/16" thru 3/8" in diameter and 2-1/2" thru 4-1/2" in length. Full assortments of #43430 contain seven (7) refills comprised of Hillman item numbers #43431 - #43437.