Lee's Universal 3 jaw chuck fits the Lee zip trim and holds any case from the tiny 25 ACP to the monster 460 Weatherby. The hardened steel jaws gently and accurately center the case while the spindle securely clamps the case. Lee's optional case spinner spindle with drill shank for use with the three jaw chuck, turns any electric drill into a high speed case polisher/lathe. Also works great to hold cases for neck turning or trimming.