KDK-200 Style Quick Change Tool Post Interchangeable with KDK same series tool Holders. All working parts hardened and ground. Lathe Swing: 18-24″ Lock Down Bolt Diameter: 3/4″ Dovetail is 1.75. Interchangeable with KDK same series tool Holders All working parts hardened and ground Lathe Swing: 18-24! Lock Down Bolt Diameter: 3/4″ Dovetail is 1.75″.