Malco precision fit and hardened Magnetic Hex Chuck Drivers, with 1/4 in power insert shanks, meet on-the-job demands for performance and service life whether installed on an electric power drill or used with a CONNEXT Quick Change Handle. Hex Driver sizes are color coded for easy identification and are available in shorts, longs and extra long sizes. Malco® Magnetic Chuck Driver, Extra Long, 5/16 in Hex Size, 6 in Overall Length, Measurement System: Imperial, Hex Shank, 1/4 in Shank, Magnetized Tip: Yes, Steel Alloy, Yellow Band