Ultra replacement 13mm (1/2') keyless drill chuck, 20 UNF thread. Replacement drill chuck for use in most small electric and cordless drills. Self tightening chuck type.
- Fits most 13mm drills
- 1/2in x 20 UNF thread
- Opening capacity: 13mm
- Durable all metal construction
Most chucks will have a reverse threaded screw locking them in place that will have to be removed before unscrewing and replacing the chuck.