Keyless Chuck
You can regulate the size of the opening on these expandable chucks as
you would twist the adjustable collet of your drill. The other end is a
female 1/2" or 5/8" arbor (smooth with set screws or 1/2" threaded)
which attaches to the rotating shank of your bench motor or Drill press.
Threaded Chucks are right hand only.
Sale items are listed in red.