The specially designed 1/4" hex quick-release chuck has a deep well to stabilize long bits and minimize runout.
Kit includes the chuck, a 3/8" HSS Kreg step drill bit with a 1/4" hex shank, a depth collar and hex key, plus a 6" #2 square recess driver. The drill bit is also sold separately.
Since the chuck solidly grips plain and grooved shanks, you can use it with any 1/4" hex attachment.
Made in USA.