CA Piston Tool Post 14-20 Swing Quick Change Lathe Tool Holder 250-400. Our part # ALL-47400. For use on lathes with 14″ – 20″ swing (defined as the diamter that can be turned over the bed). Precision-engineered to assure repetitive accuracy. Quickly and easily installed on an engine, bench, or turret lathe for a wide range of operations. Slash Your Setup Time- instant changing from one operation to another! All working parts precision ground and hardened. Completely sealed for maintenance free operation! Turning: The unequaled rigidity of this toolpost and holders (also available) insure smoother turning without chatter or vibration! Locks holder in place with center hole piston. We also sell custom tooling packages!