Tork Craft Chuck Keyless 13mm B16

13mm Keyless Drill Chuck Budget replacement 13mm (1/2″) keyless drill chuck, 20 UNF thread. Replacement drill chuck for use in most small electric and cordless drills. • Fits most 13mm drills • 1/2in x 20 UNF thread • Opening capacity: 1.5 – 13mm Installation InfoMost chucks will have a reverse threaded screw locking them in place that will have to be removed before unscrewing and replacing the chuck.