CXA Piston Tool Post Set CNC High Precision Quick Change Lathe Holders 300Series. For use on lathes with 13-18 swing (defined as the diameter 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 insure smoother turning without ...